'lower' method causing problems when individual values are being read as 'int'
- couldn't run tests as using company locked system


Hello @AbhinavRao23! Thanks for opening this PR. We checked the lines you've touched for [PEP 8](https://www.python.org/dev/peps/pep-0008) issues, and found:

* In the file [`pandas/core/tools/datetimes.py`](https://github.com/pandas-dev/pandas/blob/a915f883447599eb739a99eb33b842ce1bd9ce50/pandas/core/tools/datetimes.py):

> [Line 893:29](https://github.com/pandas-dev/pandas/blob/a915f883447599eb739a99eb33b842ce1bd9ce50/pandas/core/tools/datetimes.py#L893): [E261](https://duckduckgo.com/?q=pep8%20E261) at least two spaces before inline comment
> [Line 893:30](https://github.com/pandas-dev/pandas/blob/a915f883447599eb739a99eb33b842ce1bd9ce50/pandas/core/tools/datetimes.py#L893): [E262](https://duckduckgo.com/?q=pep8%20E262) inline comment should start with '# '
> [Line 893:89](https://github.com/pandas-dev/pandas/blob/a915f883447599eb739a99eb33b842ce1bd9ce50/pandas/core/tools/datetimes.py#L893): [E501](https://duckduckgo.com/?q=pep8%20E501) line too long (102 > 88 characters)

 closing. please open an issue with a representative issue.