STYLE: Added explicit exceptions 
- [x] xref  #22877
- [x] tests added / passed
- [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
- [x] whatsnew entry

Fixed the following bare excepts:

> pandas/compat/pickle_compat.py:36:13: E722 do not use bare except'
> pandas/compat/pickle_compat.py:47:13: E722 do not use bare except'
> pandas/compat/pickle_compat.py:185:1: E722 do not use bare except'
> pandas/compat/pickle_compat.py:213:5: E722 do not use bare except'
> pandas/tseries/holiday.py:297:5: E722 do not use bare except'
> pandas/tseries/holiday.py:429:9: E722 do not use bare except'
> pandas/tseries/holiday.py:438:9: E722 do not use bare except'
> pandas/util/_print_versions.py:24:9: E722 do not use bare except'
> pandas/util/_print_versions.py:53:5: E722 do not use bare except'
> pandas/util/_print_versions.py:111:9: E722 do not use bare except'
> pandas/util/_validators.py:62:9: E722 do not use bare except'

Hello @NeuralFlux! Thanks for updating the PR.

 - There are no PEP8 issues in the file [`pandas/compat/pickle_compat.py`](https://github.com/NeuralFlux/pandas/blob/67645dea95355889610e455a7adef01da359cb0f/pandas/compat/pickle_compat.py) !

 - There are no PEP8 issues in the file [`pandas/tseries/holiday.py`](https://github.com/NeuralFlux/pandas/blob/67645dea95355889610e455a7adef01da359cb0f/pandas/tseries/holiday.py) !

 - There are no PEP8 issues in the file [`pandas/util/_print_versions.py`](https://github.com/NeuralFlux/pandas/blob/67645dea95355889610e455a7adef01da359cb0f/pandas/util/_print_versions.py) !

 - There are no PEP8 issues in the file [`pandas/util/_validators.py`](https://github.com/NeuralFlux/pandas/blob/67645dea95355889610e455a7adef01da359cb0f/pandas/util/_validators.py) !



##### Comment last updated on September 30, 2018 at 08:56 Hours UTC # [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/22907?src=pr&el=h1) Report
> Merging [#22907](https://codecov.io/gh/pandas-dev/pandas/pull/22907?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/14598c6f82973b33d8b55e1e493f6103f9e16a62?src=pr&el=desc) will **not change** coverage.
> The diff coverage is `27.27%`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/22907/graphs/tree.svg?width=650&token=eZ4WkYLtcO&height=150&src=pr)](https://codecov.io/gh/pandas-dev/pandas/pull/22907?src=pr&el=tree)

```diff
@@           Coverage Diff           @@
##           master   #22907   +/-   ##
=======================================
  Coverage   92.18%   92.18%           
=======================================
  Files         169      169           
  Lines       50830    50830           
=======================================
  Hits        46860    46860           
  Misses       3970     3970
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `90.6% <27.27%> (ø)` | :arrow_up: |
| #single | `42.37% <9.09%> (ø)` | :arrow_up: |

| [Impacted Files](https://codecov.io/gh/pandas-dev/pandas/pull/22907?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [pandas/util/\_print\_versions.py](https://codecov.io/gh/pandas-dev/pandas/pull/22907/diff?src=pr&el=tree#diff-cGFuZGFzL3V0aWwvX3ByaW50X3ZlcnNpb25zLnB5) | `15.71% <0%> (ø)` | :arrow_up: |
| [pandas/util/\_validators.py](https://codecov.io/gh/pandas-dev/pandas/pull/22907/diff?src=pr&el=tree#diff-cGFuZGFzL3V0aWwvX3ZhbGlkYXRvcnMucHk=) | `96.8% <0%> (ø)` | :arrow_up: |
| [pandas/compat/pickle\_compat.py](https://codecov.io/gh/pandas-dev/pandas/pull/22907/diff?src=pr&el=tree#diff-cGFuZGFzL2NvbXBhdC9waWNrbGVfY29tcGF0LnB5) | `75.6% <25%> (ø)` | :arrow_up: |
| [pandas/tseries/holiday.py](https://codecov.io/gh/pandas-dev/pandas/pull/22907/diff?src=pr&el=tree#diff-cGFuZGFzL3RzZXJpZXMvaG9saWRheS5weQ==) | `93.17% <66.66%> (ø)` | :arrow_up: |

------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/22907?src=pr&el=continue).
> **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta)
> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/22907?src=pr&el=footer). Last update [14598c6...87ea4d8](https://codecov.io/gh/pandas-dev/pandas/pull/22907?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
 Thank you so much @datapythonista ! Looking forward for those green checks! thanks @NeuralFlux  > 
> 
> thanks @NeuralFlux

My pleasure to help! Thank you for the good-first-issue! @jreback and @datapythonista 