NameError: name 'pd' is not defined

Question

I am attempting run in Jupyter

import pandas as pd                     
import matplotlib.pyplot as plt          # plotting
import numpy as np                       # dense matrices
from scipy.sparse import csr_matrix      # sparse matrices
%matplotlib inline

However when loading the dataset with

wiki = pd.read_csv('people_wiki.csv')
# add id column
wiki['id'] = range(0, len(wiki))
wiki.head(10)

the following error persists

NameError                                 Traceback (most recent call last)
<ipython-input-1-56330c326580> in <module>()
----> 1 wiki = pd.read_csv('people_wiki.csv')
      2 # add id column
      3 wiki['id'] = range(0, len(wiki))
      4 wiki.head(10)

NameError: name 'pd' is not defined

Any suggestions appreciated

Answer 1

Select Restart & Clear Output and run the cells again from the beginning.

I had the same issue, and as Ivan suggested in the comment, this resolved it.

Answer 2

If you came here from a duplicate, notice also that your code needs to contain

import pandas as pd

in the first place. If you are using a notebook like Jupyter and it's already there, or if you just added it, you probably need to re-evaluate the cell, as suggested in the currently top-voted answer by martin-martin.