# values - python plot histogram from list

## Python histogram outline (1)

It looks like either your `linewidth`

was set to zero or your `edgecolor`

was set to `'none'`

. Matplotlib changed the defaults for these in 2.0. Try using:

```
plt.hist(gaussian_numbers, edgecolor='black', linewidth=1.2)
```

I have plotted a histogram in Jupyter (Python 2) and was expecting to see the outlines of my bars but this is not the case.

I'm using the following code:

```
import matplotlib.pyplot as plt
from numpy.random import normal
gaussian_numbers = normal(size=1000)
plt.hist(gaussian_numbers)
plt.title("Gaussian Histogram")
plt.xlabel("Value")
plt.ylabel("Frequency")
plt.show()
```