Installing specific package versions with pip

935

I'm trying to install version 1.2.2 of the MySQL_python adaptor, using a fresh virtualenv created with the --no-site-packages option. The current version shown in PyPi is 1.2.3. Is there a way to install the older version? I found an article stating that this should do it:

pip install MySQL_python==1.2.2

When installed, however, it still shows MySQL_python-1.2.3-py2.6.egg-info in the site packages. Is this a problem specific to this package, or am I doing something wrong?

edited May 30 '17 at 5:47

Anthon

28.4k1693144

asked Mar 7 '11 at 22:58

Joe

7,52593135

10

Thanks for the hint, this worked for me to install an older version of openpyxl via pip install MySQL_python==1.8.9
– tim
Jun 9 '14 at 11:57

3

Yes, this also worked for pandas, thanks: pip install -Iv pandas==0.12.0
– tandy
Feb 12 '15 at 22:10

1

worked for me as well: pip install xvfbwrapper==0.2.4
– amitdatta
May 15 '16 at 18:53

add a comment |

935

pip install MySQL_python==1.2.2

When installed, however, it still shows MySQL_python-1.2.3-py2.6.egg-info in the site packages. Is this a problem specific to this package, or am I doing something wrong?

edited May 30 '17 at 5:47

Anthon

28.4k1693144

asked Mar 7 '11 at 22:58

Joe

7,52593135

10

Thanks for the hint, this worked for me to install an older version of openpyxl via pip install MySQL_python==1.8.9
– tim
Jun 9 '14 at 11:57

3

Yes, this also worked for pandas, thanks: pip install -Iv pandas==0.12.0
– tandy
Feb 12 '15 at 22:10

1

worked for me as well: pip install xvfbwrapper==0.2.4
– amitdatta
May 15 '16 at 18:53

add a comment |

935

148

pip install MySQL_python==1.2.2

When installed, however, it still shows MySQL_python-1.2.3-py2.6.egg-info in the site packages. Is this a problem specific to this package, or am I doing something wrong?

edited May 30 '17 at 5:47

Anthon

28.4k1693144

asked Mar 7 '11 at 22:58

Joe

7,52593135

pip install MySQL_python==1.2.2

When installed, however, it still shows MySQL_python-1.2.3-py2.6.egg-info in the site packages. Is this a problem specific to this package, or am I doing something wrong?

python mysql pip pypi mysql-python

edited May 30 '17 at 5:47

Anthon

28.4k1693144

asked Mar 7 '11 at 22:58

Joe

7,52593135

edited May 30 '17 at 5:47

Anthon

28.4k1693144

asked Mar 7 '11 at 22:58

Joe

7,52593135

edited May 30 '17 at 5:47

Anthon

28.4k1693144

edited May 30 '17 at 5:47

Anthon

28.4k1693144

edited May 30 '17 at 5:47

Anthon

28.4k1693144

asked Mar 7 '11 at 22:58

Joe

7,52593135

asked Mar 7 '11 at 22:58

Joe

7,52593135

asked Mar 7 '11 at 22:58

Joe

7,52593135

10

Thanks for the hint, this worked for me to install an older version of openpyxl via pip install MySQL_python==1.8.9
– tim
Jun 9 '14 at 11:57

3

Yes, this also worked for pandas, thanks: pip install -Iv pandas==0.12.0
– tandy
Feb 12 '15 at 22:10

1

worked for me as well: pip install xvfbwrapper==0.2.4
– amitdatta
May 15 '16 at 18:53

add a comment |

10

Thanks for the hint, this worked for me to install an older version of openpyxl via pip install MySQL_python==1.8.9
– tim
Jun 9 '14 at 11:57

3

Yes, this also worked for pandas, thanks: pip install -Iv pandas==0.12.0
– tandy
Feb 12 '15 at 22:10

1

worked for me as well: pip install xvfbwrapper==0.2.4
– amitdatta
May 15 '16 at 18:53

Thanks for the hint, this worked for me to install an older version of openpyxl via pip install MySQL_python==1.8.9
– tim
Jun 9 '14 at 11:57

Yes, this also worked for pandas, thanks: pip install -Iv pandas==0.12.0
– tandy
Feb 12 '15 at 22:10

worked for me as well: pip install xvfbwrapper==0.2.4
– amitdatta
May 15 '16 at 18:53

add a comment |

7 Answers
7

active

oldest

votes

672

First, I see two issues with what you're trying to do. Since you already have an installed version, you should either uninstall the current existing driver or use pip install -I MySQL_python==1.2.2

However, you'll soon find out that this doesn't work. If you look at pip's installation log, or if you do a pip install -Iv MySQL_python==1.2.2 you'll find that the PyPI URL link does not work for MySQL_python v1.2.2. You can verify this here: http://pypi.python.org/pypi/MySQL-python/1.2.2

The download link 404s and the fallback URL links are re-directing infinitely due to sourceforge.net's recent upgrade and PyPI's stale URL.

So to properly install the driver, you can follow these steps:

pip uninstall MySQL_python
pip install -Iv http://sourceforge.net/projects/mysql-python/files/mysql-python/1.2.2/MySQL-python-1.2.2.tar.gz/download

edited Jul 25 '12 at 11:36

albertjan

6,11453462

answered Mar 7 '11 at 23:18

Mahmoud Abdelkader

13.4k33148

1

There should be no problem with having multiple versions though, that's the point of creating new folders for every version and using .pth files.
– Jochen Ritzel
Mar 7 '11 at 23:26

3

This installs the correct version so is the answer to this question - thanks for your help. Hitting a different issue now: "error: command '/usr/bin/gcc-4.2' failed with exit status 1" while building '_mysql' extension. I know that I have GCC, and the install for MySQL_python 1.2.3 goes smoothly. Have others seen this issue, specifically with 1.2.2?
– Joe
Mar 8 '11 at 0:08

Make another question please and post the error message that you're getting from pip.
– Mahmoud Abdelkader
Mar 8 '11 at 0:10

2

Sure - here's the link: stackoverflow.com/questions/5226945/…
– Joe
Mar 8 '11 at 0:21

1

Curious why you use the -I option if we have already removed the existing installation - could you give some detail on that?
– Joe
Sep 11 at 9:37

|
show 1 more comment

317

You can even use a version range with pip install command. Something like this:

pip install 'stevedore>=1.3.0,<1.4.0'

And if the package is already installed and you want to downgrade it add --force-reinstall like this:

pip install 'stevedore>=1.3.0,<1.4.0' --force-reinstall

edited Dec 18 at 17:31

Community♦

answered Nov 19 '15 at 19:42

user1978556

3,187173

91

for example: $ pip install 'xkcdpass==1.2.5' --force-reinstall
– jschank
Jan 8 '16 at 18:10

1

perfect! ran on Ubunto 15.04 and it (automatically) replaced an existing library with the specified version. Solved all my problems!
– goggelj
Feb 22 '16 at 14:27

1

Just going to mention that for Python 2 I had to use double quotes " instead of '
– Hand of C'thuhlu
Mar 6 '17 at 6:28

5

@HandofC'thuhlu i think we have to use double quotes for windows and not python 2
– SmartManoj
Mar 11 '17 at 10:46

Use double quotes on Windows: pip install "stevedore>=1.3.0,<1.4.0"
– jmng
Sep 17 at 13:40

|
show 1 more comment

103

One way as suggested in this post is to mention version in pip as

pip install -Iv MySQL_python==1.2.2

i.e. Use == and mention the version number to install only that version. -I, --ignore-installed ignores already installed packages.

edited May 23 '17 at 12:10

Community♦

answered Apr 4 '16 at 9:58

Srikar Appalaraju

48.6k44183244

add a comment |

I believe that if you already have a package it installed, pip will not overwrite it with another version. Use -I to ignore previous versions.

answered Mar 7 '11 at 23:13

dappawit

8,05522424

I do not have it installed - using a fresh virtualenv created with the --no-site-packages option
– Joe
Mar 7 '11 at 23:14

2

okay, so you ask for version 1.2.2 and it still installs 1.2.3, and nothing else was installed? The syntax you used is correct for getting specific versions.
– dappawit
Mar 7 '11 at 23:15

"using a fresh virtualenv created with the --no-site-packages option"; you might need to preceed this with the command unset PYTHONPATH so to keep pip from seeing your pre-installed libraries
– user5359531
Sep 29 '17 at 15:16

add a comment |

To install a specific python package version whether it is the first time, an upgrade or a downgrade use:

pip install --force-reinstall MySQL_python==1.2.4

MySQL_python version 1.2.2 is not available so I used a different version. To view all available package versions from an index exclude the version:

pip install MySQL_python==

answered Apr 5 at 7:00

Zach Weg

45147

2

With pip 10.0.1 this is the only working solution. "-I" option actually reinstall the previous version.
– FedFranz
Jun 13 at 10:52

add a comment |

Since this appeared to be a breaking change introduced in version 10 of pip, I downgraded to a compatible version:

pip install 'pip<10'

This command tells pip to install a version of the module lower than version 10. Do this in a virutalenv so you don't screw up your site installation of Python.

answered Sep 2 at 0:54

Trenton

6,28783751

add a comment |

There are 2 ways you may install any package with version:-
A). pip install -Iv package-name == version
B). pip install -v package-name == version

For A

Here, if you're using -I option while installing(when you don't know if the package is already installed) (like 'pip install -Iv pyreadline == 2.* 'or something), you would be installing a new separate package with the same existing package having some different version.

For B

At first, you may want to check for no broken requirements.
pip check

2.and then see what's already installed by
pip list

3.if the list of the packages contain any package that you wish to install with specific version then the better option is to uninstall the package of this version first, by
pip uninstall package-name

4.And now you can go ahead to reinstall the same package with a specific version, by
pip install -v package-name==version
e.g. pip install -v pyreadline == 2.*

answered Nov 12 at 6:14

Samarth

111

add a comment |

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7 Answers
7

active

oldest

votes

7 Answers
7

active

oldest

votes

672

First, I see two issues with what you're trying to do. Since you already have an installed version, you should either uninstall the current existing driver or use pip install -I MySQL_python==1.2.2

The download link 404s and the fallback URL links are re-directing infinitely due to sourceforge.net's recent upgrade and PyPI's stale URL.

So to properly install the driver, you can follow these steps:

pip uninstall MySQL_python
pip install -Iv http://sourceforge.net/projects/mysql-python/files/mysql-python/1.2.2/MySQL-python-1.2.2.tar.gz/download

edited Jul 25 '12 at 11:36

albertjan

6,11453462

answered Mar 7 '11 at 23:18

Mahmoud Abdelkader

13.4k33148

1

There should be no problem with having multiple versions though, that's the point of creating new folders for every version and using .pth files.
– Jochen Ritzel
Mar 7 '11 at 23:26

3

This installs the correct version so is the answer to this question - thanks for your help. Hitting a different issue now: "error: command '/usr/bin/gcc-4.2' failed with exit status 1" while building '_mysql' extension. I know that I have GCC, and the install for MySQL_python 1.2.3 goes smoothly. Have others seen this issue, specifically with 1.2.2?
– Joe
Mar 8 '11 at 0:08

Make another question please and post the error message that you're getting from pip.
– Mahmoud Abdelkader
Mar 8 '11 at 0:10

2

Sure - here's the link: stackoverflow.com/questions/5226945/…
– Joe
Mar 8 '11 at 0:21

1

Curious why you use the -I option if we have already removed the existing installation - could you give some detail on that?
– Joe
Sep 11 at 9:37

|
show 1 more comment

672

First, I see two issues with what you're trying to do. Since you already have an installed version, you should either uninstall the current existing driver or use pip install -I MySQL_python==1.2.2

The download link 404s and the fallback URL links are re-directing infinitely due to sourceforge.net's recent upgrade and PyPI's stale URL.

So to properly install the driver, you can follow these steps:

pip uninstall MySQL_python
pip install -Iv http://sourceforge.net/projects/mysql-python/files/mysql-python/1.2.2/MySQL-python-1.2.2.tar.gz/download

edited Jul 25 '12 at 11:36

albertjan

6,11453462

answered Mar 7 '11 at 23:18

Mahmoud Abdelkader

13.4k33148

1

There should be no problem with having multiple versions though, that's the point of creating new folders for every version and using .pth files.
– Jochen Ritzel
Mar 7 '11 at 23:26

3

This installs the correct version so is the answer to this question - thanks for your help. Hitting a different issue now: "error: command '/usr/bin/gcc-4.2' failed with exit status 1" while building '_mysql' extension. I know that I have GCC, and the install for MySQL_python 1.2.3 goes smoothly. Have others seen this issue, specifically with 1.2.2?
– Joe
Mar 8 '11 at 0:08

Make another question please and post the error message that you're getting from pip.
– Mahmoud Abdelkader
Mar 8 '11 at 0:10

2

Sure - here's the link: stackoverflow.com/questions/5226945/…
– Joe
Mar 8 '11 at 0:21

1

Curious why you use the -I option if we have already removed the existing installation - could you give some detail on that?
– Joe
Sep 11 at 9:37

|
show 1 more comment

672

First, I see two issues with what you're trying to do. Since you already have an installed version, you should either uninstall the current existing driver or use pip install -I MySQL_python==1.2.2

The download link 404s and the fallback URL links are re-directing infinitely due to sourceforge.net's recent upgrade and PyPI's stale URL.

So to properly install the driver, you can follow these steps:

pip uninstall MySQL_python
pip install -Iv http://sourceforge.net/projects/mysql-python/files/mysql-python/1.2.2/MySQL-python-1.2.2.tar.gz/download

edited Jul 25 '12 at 11:36

albertjan

6,11453462

answered Mar 7 '11 at 23:18

Mahmoud Abdelkader

13.4k33148

First, I see two issues with what you're trying to do. Since you already have an installed version, you should either uninstall the current existing driver or use pip install -I MySQL_python==1.2.2

The download link 404s and the fallback URL links are re-directing infinitely due to sourceforge.net's recent upgrade and PyPI's stale URL.

So to properly install the driver, you can follow these steps:

pip uninstall MySQL_python
pip install -Iv http://sourceforge.net/projects/mysql-python/files/mysql-python/1.2.2/MySQL-python-1.2.2.tar.gz/download

edited Jul 25 '12 at 11:36

albertjan

6,11453462

answered Mar 7 '11 at 23:18

Mahmoud Abdelkader

13.4k33148

edited Jul 25 '12 at 11:36

albertjan

6,11453462

edited Jul 25 '12 at 11:36

albertjan

6,11453462

edited Jul 25 '12 at 11:36

albertjan

6,11453462

answered Mar 7 '11 at 23:18

Mahmoud Abdelkader

13.4k33148

answered Mar 7 '11 at 23:18

Mahmoud Abdelkader

13.4k33148

answered Mar 7 '11 at 23:18

Mahmoud Abdelkader

13.4k33148

1

There should be no problem with having multiple versions though, that's the point of creating new folders for every version and using .pth files.
– Jochen Ritzel
Mar 7 '11 at 23:26

3

This installs the correct version so is the answer to this question - thanks for your help. Hitting a different issue now: "error: command '/usr/bin/gcc-4.2' failed with exit status 1" while building '_mysql' extension. I know that I have GCC, and the install for MySQL_python 1.2.3 goes smoothly. Have others seen this issue, specifically with 1.2.2?
– Joe
Mar 8 '11 at 0:08

Make another question please and post the error message that you're getting from pip.
– Mahmoud Abdelkader
Mar 8 '11 at 0:10

2

Sure - here's the link: stackoverflow.com/questions/5226945/…
– Joe
Mar 8 '11 at 0:21

1

Curious why you use the -I option if we have already removed the existing installation - could you give some detail on that?
– Joe
Sep 11 at 9:37

|
show 1 more comment

1

There should be no problem with having multiple versions though, that's the point of creating new folders for every version and using .pth files.
– Jochen Ritzel
Mar 7 '11 at 23:26

3

This installs the correct version so is the answer to this question - thanks for your help. Hitting a different issue now: "error: command '/usr/bin/gcc-4.2' failed with exit status 1" while building '_mysql' extension. I know that I have GCC, and the install for MySQL_python 1.2.3 goes smoothly. Have others seen this issue, specifically with 1.2.2?
– Joe
Mar 8 '11 at 0:08

Make another question please and post the error message that you're getting from pip.
– Mahmoud Abdelkader
Mar 8 '11 at 0:10

2

Sure - here's the link: stackoverflow.com/questions/5226945/…
– Joe
Mar 8 '11 at 0:21

1

Curious why you use the -I option if we have already removed the existing installation - could you give some detail on that?
– Joe
Sep 11 at 9:37

There should be no problem with having multiple versions though, that's the point of creating new folders for every version and using .pth files.
– Jochen Ritzel
Mar 7 '11 at 23:26

This installs the correct version so is the answer to this question - thanks for your help. Hitting a different issue now: "error: command '/usr/bin/gcc-4.2' failed with exit status 1" while building '_mysql' extension. I know that I have GCC, and the install for MySQL_python 1.2.3 goes smoothly. Have others seen this issue, specifically with 1.2.2?
– Joe
Mar 8 '11 at 0:08

Make another question please and post the error message that you're getting from pip.
– Mahmoud Abdelkader
Mar 8 '11 at 0:10

Sure - here's the link: stackoverflow.com/questions/5226945/…
– Joe
Mar 8 '11 at 0:21

Curious why you use the -I option if we have already removed the existing installation - could you give some detail on that?
– Joe
Sep 11 at 9:37

|
show 1 more comment

317

You can even use a version range with pip install command. Something like this:

pip install 'stevedore>=1.3.0,<1.4.0'

And if the package is already installed and you want to downgrade it add --force-reinstall like this:

pip install 'stevedore>=1.3.0,<1.4.0' --force-reinstall

edited Dec 18 at 17:31

Community♦

answered Nov 19 '15 at 19:42

user1978556

3,187173

91

for example: $ pip install 'xkcdpass==1.2.5' --force-reinstall
– jschank
Jan 8 '16 at 18:10

1

perfect! ran on Ubunto 15.04 and it (automatically) replaced an existing library with the specified version. Solved all my problems!
– goggelj
Feb 22 '16 at 14:27

1

Just going to mention that for Python 2 I had to use double quotes " instead of '
– Hand of C'thuhlu
Mar 6 '17 at 6:28

5

@HandofC'thuhlu i think we have to use double quotes for windows and not python 2
– SmartManoj
Mar 11 '17 at 10:46

Use double quotes on Windows: pip install "stevedore>=1.3.0,<1.4.0"
– jmng
Sep 17 at 13:40

|
show 1 more comment

317

You can even use a version range with pip install command. Something like this:

pip install 'stevedore>=1.3.0,<1.4.0'

And if the package is already installed and you want to downgrade it add --force-reinstall like this:

pip install 'stevedore>=1.3.0,<1.4.0' --force-reinstall

edited Dec 18 at 17:31

Community♦

answered Nov 19 '15 at 19:42

user1978556

3,187173

91

for example: $ pip install 'xkcdpass==1.2.5' --force-reinstall
– jschank
Jan 8 '16 at 18:10

1

perfect! ran on Ubunto 15.04 and it (automatically) replaced an existing library with the specified version. Solved all my problems!
– goggelj
Feb 22 '16 at 14:27

1

Just going to mention that for Python 2 I had to use double quotes " instead of '
– Hand of C'thuhlu
Mar 6 '17 at 6:28

5

@HandofC'thuhlu i think we have to use double quotes for windows and not python 2
– SmartManoj
Mar 11 '17 at 10:46

Use double quotes on Windows: pip install "stevedore>=1.3.0,<1.4.0"
– jmng
Sep 17 at 13:40

|
show 1 more comment

317

You can even use a version range with pip install command. Something like this:

pip install 'stevedore>=1.3.0,<1.4.0'

And if the package is already installed and you want to downgrade it add --force-reinstall like this:

pip install 'stevedore>=1.3.0,<1.4.0' --force-reinstall

edited Dec 18 at 17:31

Community♦

answered Nov 19 '15 at 19:42

user1978556

3,187173

You can even use a version range with pip install command. Something like this:

pip install 'stevedore>=1.3.0,<1.4.0'

And if the package is already installed and you want to downgrade it add --force-reinstall like this:

pip install 'stevedore>=1.3.0,<1.4.0' --force-reinstall

edited Dec 18 at 17:31

Community♦

answered Nov 19 '15 at 19:42

user1978556

3,187173

edited Dec 18 at 17:31

Community♦

edited Dec 18 at 17:31

Community♦

edited Dec 18 at 17:31

Community♦

answered Nov 19 '15 at 19:42

user1978556

3,187173

answered Nov 19 '15 at 19:42

user1978556

3,187173

answered Nov 19 '15 at 19:42

user1978556

3,187173

91

for example: $ pip install 'xkcdpass==1.2.5' --force-reinstall
– jschank
Jan 8 '16 at 18:10

1

perfect! ran on Ubunto 15.04 and it (automatically) replaced an existing library with the specified version. Solved all my problems!
– goggelj
Feb 22 '16 at 14:27

1

Just going to mention that for Python 2 I had to use double quotes " instead of '
– Hand of C'thuhlu
Mar 6 '17 at 6:28

5

@HandofC'thuhlu i think we have to use double quotes for windows and not python 2
– SmartManoj
Mar 11 '17 at 10:46

Use double quotes on Windows: pip install "stevedore>=1.3.0,<1.4.0"
– jmng
Sep 17 at 13:40

|
show 1 more comment

91

for example: $ pip install 'xkcdpass==1.2.5' --force-reinstall
– jschank
Jan 8 '16 at 18:10

1

perfect! ran on Ubunto 15.04 and it (automatically) replaced an existing library with the specified version. Solved all my problems!
– goggelj
Feb 22 '16 at 14:27

1

Just going to mention that for Python 2 I had to use double quotes " instead of '
– Hand of C'thuhlu
Mar 6 '17 at 6:28

5

@HandofC'thuhlu i think we have to use double quotes for windows and not python 2
– SmartManoj
Mar 11 '17 at 10:46

Use double quotes on Windows: pip install "stevedore>=1.3.0,<1.4.0"
– jmng
Sep 17 at 13:40

for example: $ pip install 'xkcdpass==1.2.5' --force-reinstall
– jschank
Jan 8 '16 at 18:10

perfect! ran on Ubunto 15.04 and it (automatically) replaced an existing library with the specified version. Solved all my problems!
– goggelj
Feb 22 '16 at 14:27

Just going to mention that for Python 2 I had to use double quotes " instead of '
– Hand of C'thuhlu
Mar 6 '17 at 6:28

@HandofC'thuhlu i think we have to use double quotes for windows and not python 2
– SmartManoj
Mar 11 '17 at 10:46

Use double quotes on Windows: pip install "stevedore>=1.3.0,<1.4.0"
– jmng
Sep 17 at 13:40

|
show 1 more comment

103

One way as suggested in this post is to mention version in pip as

pip install -Iv MySQL_python==1.2.2

i.e. Use == and mention the version number to install only that version. -I, --ignore-installed ignores already installed packages.

edited May 23 '17 at 12:10

Community♦

answered Apr 4 '16 at 9:58

Srikar Appalaraju

48.6k44183244

add a comment |

103

One way as suggested in this post is to mention version in pip as

pip install -Iv MySQL_python==1.2.2

i.e. Use == and mention the version number to install only that version. -I, --ignore-installed ignores already installed packages.

edited May 23 '17 at 12:10

Community♦

answered Apr 4 '16 at 9:58

Srikar Appalaraju

48.6k44183244

add a comment |

103

One way as suggested in this post is to mention version in pip as

pip install -Iv MySQL_python==1.2.2

i.e. Use == and mention the version number to install only that version. -I, --ignore-installed ignores already installed packages.

edited May 23 '17 at 12:10

Community♦

answered Apr 4 '16 at 9:58

Srikar Appalaraju

48.6k44183244

One way as suggested in this post is to mention version in pip as

pip install -Iv MySQL_python==1.2.2

i.e. Use == and mention the version number to install only that version. -I, --ignore-installed ignores already installed packages.

edited May 23 '17 at 12:10

Community♦

answered Apr 4 '16 at 9:58

Srikar Appalaraju

48.6k44183244

edited May 23 '17 at 12:10

Community♦

edited May 23 '17 at 12:10

Community♦

edited May 23 '17 at 12:10

Community♦

answered Apr 4 '16 at 9:58

Srikar Appalaraju

48.6k44183244

answered Apr 4 '16 at 9:58

Srikar Appalaraju

48.6k44183244

answered Apr 4 '16 at 9:58

Srikar Appalaraju

48.6k44183244

add a comment |

I believe that if you already have a package it installed, pip will not overwrite it with another version. Use -I to ignore previous versions.

answered Mar 7 '11 at 23:13

dappawit

8,05522424

I do not have it installed - using a fresh virtualenv created with the --no-site-packages option
– Joe
Mar 7 '11 at 23:14

2

okay, so you ask for version 1.2.2 and it still installs 1.2.3, and nothing else was installed? The syntax you used is correct for getting specific versions.
– dappawit
Mar 7 '11 at 23:15

"using a fresh virtualenv created with the --no-site-packages option"; you might need to preceed this with the command unset PYTHONPATH so to keep pip from seeing your pre-installed libraries
– user5359531
Sep 29 '17 at 15:16

add a comment |

I believe that if you already have a package it installed, pip will not overwrite it with another version. Use -I to ignore previous versions.

answered Mar 7 '11 at 23:13

dappawit

8,05522424

I do not have it installed - using a fresh virtualenv created with the --no-site-packages option
– Joe
Mar 7 '11 at 23:14

2

okay, so you ask for version 1.2.2 and it still installs 1.2.3, and nothing else was installed? The syntax you used is correct for getting specific versions.
– dappawit
Mar 7 '11 at 23:15

"using a fresh virtualenv created with the --no-site-packages option"; you might need to preceed this with the command unset PYTHONPATH so to keep pip from seeing your pre-installed libraries
– user5359531
Sep 29 '17 at 15:16

add a comment |

I believe that if you already have a package it installed, pip will not overwrite it with another version. Use -I to ignore previous versions.

answered Mar 7 '11 at 23:13

dappawit

8,05522424

I believe that if you already have a package it installed, pip will not overwrite it with another version. Use -I to ignore previous versions.

answered Mar 7 '11 at 23:13

dappawit

8,05522424

answered Mar 7 '11 at 23:13

dappawit

8,05522424

answered Mar 7 '11 at 23:13

dappawit

8,05522424

answered Mar 7 '11 at 23:13

dappawit

8,05522424

I do not have it installed - using a fresh virtualenv created with the --no-site-packages option
– Joe
Mar 7 '11 at 23:14

2

okay, so you ask for version 1.2.2 and it still installs 1.2.3, and nothing else was installed? The syntax you used is correct for getting specific versions.
– dappawit
Mar 7 '11 at 23:15

"using a fresh virtualenv created with the --no-site-packages option"; you might need to preceed this with the command unset PYTHONPATH so to keep pip from seeing your pre-installed libraries
– user5359531
Sep 29 '17 at 15:16

add a comment |

I do not have it installed - using a fresh virtualenv created with the --no-site-packages option
– Joe
Mar 7 '11 at 23:14

2

okay, so you ask for version 1.2.2 and it still installs 1.2.3, and nothing else was installed? The syntax you used is correct for getting specific versions.
– dappawit
Mar 7 '11 at 23:15

"using a fresh virtualenv created with the --no-site-packages option"; you might need to preceed this with the command unset PYTHONPATH so to keep pip from seeing your pre-installed libraries
– user5359531
Sep 29 '17 at 15:16

I do not have it installed - using a fresh virtualenv created with the --no-site-packages option
– Joe
Mar 7 '11 at 23:14

okay, so you ask for version 1.2.2 and it still installs 1.2.3, and nothing else was installed? The syntax you used is correct for getting specific versions.
– dappawit
Mar 7 '11 at 23:15

"using a fresh virtualenv created with the --no-site-packages option"; you might need to preceed this with the command unset PYTHONPATH so to keep pip from seeing your pre-installed libraries
– user5359531
Sep 29 '17 at 15:16

add a comment |

To install a specific python package version whether it is the first time, an upgrade or a downgrade use:

pip install --force-reinstall MySQL_python==1.2.4

MySQL_python version 1.2.2 is not available so I used a different version. To view all available package versions from an index exclude the version:

pip install MySQL_python==

answered Apr 5 at 7:00

Zach Weg

45147

2

With pip 10.0.1 this is the only working solution. "-I" option actually reinstall the previous version.
– FedFranz
Jun 13 at 10:52

add a comment |

To install a specific python package version whether it is the first time, an upgrade or a downgrade use:

pip install --force-reinstall MySQL_python==1.2.4

MySQL_python version 1.2.2 is not available so I used a different version. To view all available package versions from an index exclude the version:

pip install MySQL_python==

answered Apr 5 at 7:00

Zach Weg

45147

2

With pip 10.0.1 this is the only working solution. "-I" option actually reinstall the previous version.
– FedFranz
Jun 13 at 10:52

add a comment |

To install a specific python package version whether it is the first time, an upgrade or a downgrade use:

pip install --force-reinstall MySQL_python==1.2.4

MySQL_python version 1.2.2 is not available so I used a different version. To view all available package versions from an index exclude the version:

pip install MySQL_python==

answered Apr 5 at 7:00

Zach Weg

45147

To install a specific python package version whether it is the first time, an upgrade or a downgrade use:

pip install --force-reinstall MySQL_python==1.2.4

MySQL_python version 1.2.2 is not available so I used a different version. To view all available package versions from an index exclude the version:

pip install MySQL_python==

answered Apr 5 at 7:00

Zach Weg

45147

answered Apr 5 at 7:00

Zach Weg

45147

answered Apr 5 at 7:00

Zach Weg

45147

answered Apr 5 at 7:00

Zach Weg

45147

2

With pip 10.0.1 this is the only working solution. "-I" option actually reinstall the previous version.
– FedFranz
Jun 13 at 10:52

add a comment |

2

With pip 10.0.1 this is the only working solution. "-I" option actually reinstall the previous version.
– FedFranz
Jun 13 at 10:52

With pip 10.0.1 this is the only working solution. "-I" option actually reinstall the previous version.
– FedFranz
Jun 13 at 10:52

add a comment |

Since this appeared to be a breaking change introduced in version 10 of pip, I downgraded to a compatible version:

pip install 'pip<10'

This command tells pip to install a version of the module lower than version 10. Do this in a virutalenv so you don't screw up your site installation of Python.

answered Sep 2 at 0:54

Trenton

6,28783751

add a comment |

Since this appeared to be a breaking change introduced in version 10 of pip, I downgraded to a compatible version:

pip install 'pip<10'

This command tells pip to install a version of the module lower than version 10. Do this in a virutalenv so you don't screw up your site installation of Python.

answered Sep 2 at 0:54

Trenton

6,28783751

add a comment |

Since this appeared to be a breaking change introduced in version 10 of pip, I downgraded to a compatible version:

pip install 'pip<10'

This command tells pip to install a version of the module lower than version 10. Do this in a virutalenv so you don't screw up your site installation of Python.

answered Sep 2 at 0:54

Trenton

6,28783751

Since this appeared to be a breaking change introduced in version 10 of pip, I downgraded to a compatible version:

pip install 'pip<10'

This command tells pip to install a version of the module lower than version 10. Do this in a virutalenv so you don't screw up your site installation of Python.

answered Sep 2 at 0:54

Trenton

6,28783751

answered Sep 2 at 0:54

Trenton

6,28783751

answered Sep 2 at 0:54

Trenton

6,28783751

answered Sep 2 at 0:54

Trenton

6,28783751

add a comment |

There are 2 ways you may install any package with version:-
A). pip install -Iv package-name == version
B). pip install -v package-name == version

For A

For B

At first, you may want to check for no broken requirements.
pip check

2.and then see what's already installed by
pip list

4.And now you can go ahead to reinstall the same package with a specific version, by
pip install -v package-name==version
e.g. pip install -v pyreadline == 2.*

answered Nov 12 at 6:14

Samarth

111

add a comment |

There are 2 ways you may install any package with version:-
A). pip install -Iv package-name == version
B). pip install -v package-name == version

For A

For B

At first, you may want to check for no broken requirements.
pip check

2.and then see what's already installed by
pip list

4.And now you can go ahead to reinstall the same package with a specific version, by
pip install -v package-name==version
e.g. pip install -v pyreadline == 2.*

answered Nov 12 at 6:14

Samarth

111

add a comment |

There are 2 ways you may install any package with version:-
A). pip install -Iv package-name == version
B). pip install -v package-name == version

For A

For B

At first, you may want to check for no broken requirements.
pip check

2.and then see what's already installed by
pip list

4.And now you can go ahead to reinstall the same package with a specific version, by
pip install -v package-name==version
e.g. pip install -v pyreadline == 2.*

answered Nov 12 at 6:14

Samarth

111

There are 2 ways you may install any package with version:-
A). pip install -Iv package-name == version
B). pip install -v package-name == version

For A

For B

At first, you may want to check for no broken requirements.
pip check

2.and then see what's already installed by
pip list

4.And now you can go ahead to reinstall the same package with a specific version, by
pip install -v package-name==version
e.g. pip install -v pyreadline == 2.*

answered Nov 12 at 6:14

Samarth

111

answered Nov 12 at 6:14

Samarth

111

answered Nov 12 at 6:14

Samarth

111

answered Nov 12 at 6:14

Samarth

111

add a comment |

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