Pandas: Count number of columns of a DataFrame
Pandas: DataFrame Exercise-57 with Solution
Write a Pandas program to count number of columns of a DataFrame.
Sample Solution :
Python Code :
import pandas as pd
d = {'col1': [1, 2, 3, 4, 7], 'col2': [4, 5, 6, 9, 5], 'col3': [7, 8, 12, 1, 11]}
df = pd.DataFrame(data=d)
print("Original DataFrame")
print(df)
print("\nNumber of columns:")
print(len(df.columns))
Sample Output:
Original DataFrame col1 col2 col3 0 1 4 7 1 2 5 8 2 3 6 12 3 4 9 1 4 7 5 11 Number of columns: 3
Python-Pandas Code Editor:
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Previous: Write a Pandas program to get column index from column name of a given DataFrame.
Next: Write a Pandas program to select all columns, except one given column in a DataFrame.
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Python: Tips of the Day
Join Strings in an Iterable:
>>> words = ('Hello', 'Python', 'Programmers') >>> '!'.join(words) 'Hello!Python!Programmers' >>> words_dict = {0: 'zero', 1: 'one', 2: 'two', 3: 'three'} >>> '&'.join(words_dict.values()) 'zero&one&two&three'
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