问题
When I try to run:
[root@pex appliance_ui]# curl https://bootstrap.pypa.io./get-pip.py | python
It returns:
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 1603k 100 1603k 0 0 7006k 0 --:--:-- --:--:-- --:--:-- 13.2M
Traceback (most recent call last):
File "<stdin>", line 20649, in <module>
File "<stdin>", line 197, in main
File "<stdin>", line 82, in bootstrap
File "/tmp/tmpH39pcu/pip.zip/pip/_internal/__init__.py", line 42, in <module>
File "/tmp/tmpH39pcu/pip.zip/pip/_internal/cmdoptions.py", line 16, in <module>
File "/tmp/tmpH39pcu/pip.zip/pip/_internal/index.py", line 526
{str(c.version) for c in all_candidates},
^
SyntaxError: invalid syntax
Also,
[root@pex appliance_ui]# python get-pip.py --verbose
Output:
python: can't open file 'get-pip.py': [Errno 2] No such file or directory
Can anyone tell me why is this happening? I have Python 2.6 and pip 9.0.1. My aim is to upgrade to python 3.5 soon on the whole project.
回答1:
The version of Python you're using found at python doesn't support set comprehensions. I can see the same error trying to do {str('foo') for c in [1,2,3]} in Python 2.4 as opposed to 2.7 where it works.
Per the answer here and the note in this section of the pip installation documentation you should use this URL for get-pip.py on 2.6: https://bootstrap.pypa.io/2.6/get-pip.py
You can also see Python 2.7 is the oldest supported version listed here: https://pip.pypa.io/en/stable/installing/#python-and-os-compatibility
As for [Errno 2] No such file or directory, that's because curl puts the file contents on standard out, not on your file system. If you wanted to download the file you would use wget.
来源：https://stackoverflow.com/questions/50045697/curl-for-get-pip-py-does-not-work-syntax-error