BUG: Pandas Import is failing under Conda Python 3.7
- [x ] I have checked that this issue has not already been reported.

- [ x] I have confirmed this bug exists on the latest version of pandas.

- [ x] (optional) I have confirmed this bug exists on the master branch of pandas.

---

**Note**: Please read [this guide](https://matthewrocklin.com/blog/work/2018/02/28/minimal-bug-reports) detailing how to provide the necessary information for us to reproduce your bug.

#### Code Sample, a copy-pastable example

```python
import pandas

```

#### Problem description

Pandas import is failing.

#### Expected Output

Pandas to work.

#### Output of ``pd.show_versions()``

<details>
```
Traceback (most recent call last):
  File "/me/anaconda3/envs/py37/lib/python3.7/site-packages/pandas/__init__.py", line 29, in <module>
  File "/me/anaconda3/envs/py37/lib/python3.7/site-packages/pandas/_libs/__init__.py", line 13, in <module>
ImportError: /me/anaconda3/envs/py37/lib/python3.7/site-packages/pandas/_libs/interval.cpython-37m-x86_64-linux-gnu.so: invalid ELF header

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/me/anaconda3/envs/py37/lib/python3.7/site-packages/pandas/__init__.py", line 37, in <module>
ImportError: C extension: /me/anaconda3/envs/py37/lib/python3.7/site-packages/pandas/_libs/interval.cpython-37m-x86_64-linux-gnu.so: invalid ELF header not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --force' to build the C extensions first.Traceback (most recent call last):
  File "/me/anaconda3/envs/py37/lib/python3.7/site-packages/pandas/__init__.py", line 29, in <module>
  File "/me/anaconda3/envs/py37/lib/python3.7/site-packages/pandas/_libs/__init__.py", line 13, in <module>
ImportError: /me/anaconda3/envs/py37/lib/python3.7/site-packages/pandas/_libs/interval.cpython-37m-x86_64-linux-gnu.so: invalid ELF header

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/me/anaconda3/envs/py37/lib/python3.7/site-packages/pandas/__init__.py", line 37, in <module>
ImportError: C extension: /me/anaconda3/envs/py37/lib/python3.7/site-packages/pandas/_libs/interval.cpython-37m-x86_64-linux-gnu.so: invalid ELF header not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --force' to build the C extensions first.
```
</details>
