reindent.py - Does not work from the command line - python-2.7

Question

I have problems with indentation in Python. So I downloaded reindent.py to correct the indentation errors.
I installed reindent.py using the following command-:
pip install reindent
But I running it from the command line shows me the following error-:
Traceback (most recent call last):
File "/usr/local/bin/reindent", line 3, in <module>
main()
File "/usr/local/lib/python2.7/dist-packages/reindent.py", line 92, in main
check(arg)
File "/usr/local/lib/python2.7/dist-packages/reindent.py", line 118, in check
if r.run():
File "/usr/local/lib/python2.7/dist-packages/reindent.py", line 177, in run
tokenize.tokenize(self.getline, self.tokeneater)
File "/usr/lib/python2.7/tokenize.py", line 170, in tokenize
tokenize_loop(readline, tokeneater)
File "/usr/lib/python2.7/tokenize.py", line 176, in tokenize_loop
for token_info in generate_tokens(readline):
File "/usr/lib/python2.7/tokenize.py", line 357, in generate_tokens
("<tokenize>", lnum, pos, line))
File "<tokenize>", line 127
for w in transcript:
^
IndentationError: unindent does not match any outer indentation level
I am running it with the following command-:
reindent -n test1.py
I thought reindent was supposed to correct the errors not show me where they occurred.

Answer 1

reindent.py changes tabs to spaces and can make irregular indentation a uniform 4-spaces. It does not attempt to catch or fix IndentationErrors.
Consider this code which has an IndentationError:
def foo():
print("Let's go")
for i in range(2): <-- IndentationError
print('Peay')
It produces a similar error message to the one you are getting:
% reindent.py script.py
Traceback (most recent call last):
...
File "/usr/lib/python2.7/tokenize.py", line 170, in tokenize
tokenize_loop(readline, tokeneater)
File "/usr/lib/python2.7/tokenize.py", line 176, in tokenize_loop
for token_info in generate_tokens(readline):
File "/usr/lib/python2.7/tokenize.py", line 357, in generate_tokens
("<tokenize>", lnum, pos, line))
File "<tokenize>", line 9
for i in range(2):
^
IndentationError: unindent does not match any outer indentation level
Both
def foo():
print("Let's go")
for i in range(2):
print('Peay')
and
def foo():
print("Let's go")
for i in range(2):
print('Peay')
are valid ways to fix the code. reindent.py (or the tokenize module that it
relies on) does not attempt to guess which one the coder intended. Thus,
IndentationErrors are SyntaxErrors that at least sometimes require human
intervention to fix.