Is there a way to Label/Annotate My Bubble Plot (Scatter plot with a z-axis) on matplotlib? I would like to label my bubble plot, with the labels being INSIDE the bubbles. Something like this. 
 

Is There any way to do that?

What I've tried:

plt.annotate(temp.index, (temp.gre_total, temp.ugrad_gpa))
plt.show()


But that throws an error. I think that would only work if I looped through every value? I'm not very sure.
You can use the seaborn package, using the scatterplot marker size to generate your bubbles. Then you need to loop over the datapoints and add a text labet to each point in your scatterplot.

# Load libraries
import pandas as pd
import matplotlib.pylab as plt
import seaborn as sns

# Create example dataframe
df = pd.DataFrame({
'x': [1, 1.1, 1.2, 2, 5],
'y': [5, 15, 7, 10, 2],
's': [10000,20000,30000,40000,50000],
'group': ['Stamford','Yale','Harvard','MIT','Cambridge']
})

#Create figure
plt.figure(figsize = (15,10))

# Create scatterplot. alpha controls the opacity and s controls the size.
ax = sns.scatterplot(df.x, df.y, alpha = 0.5,s = df.s)

ax.set_xlim(0,6)
ax.set_ylim(-2, 18)

#For each point, we add a text inside the bubble
for line in range(0,df.shape[0]):
     ax.text(df.x[line], df.y[line], df.group[line], horizontalalignment='center', size='medium', color='black', weight='semibold')


Which outputs: