In [1]:

    

l = [0, 1, 2]

print(len(l))


    

    




3

In [2]:

    

t = (0, 1, 2)

print(len(t))


    

    




3

In [3]:

    

s = {0, 1, 2}

print(len(s))


    

    




3

In [4]:

    

d = {'key0': 0, 'key1': 1, 'key2': 2}

print(len(d))


    

    




3

In [5]:

    

s = 'abcde'

print(len(s))


    

    




5

In [6]:

    

s = 'あいうえお'

print(len(s))


    

    




5

In [7]:

    

import numpy as np


    

In [8]:

    

a_1d = np.arange(3)

print(a_1d)


    

    




[0 1 2]

In [9]:

    

print(len(a_1d))


    

    




3

In [10]:

    

a_2d = np.arange(12).reshape((3, 4))

print(a_2d)


    

    




[[ 0  1  2  3]
 [ 4  5  6  7]
 [ 8  9 10 11]]

In [11]:

    

print(len(a_2d))


    

    




3

In [12]:

    

a_3d = np.arange(24).reshape((2, 3, 4))

print(a_3d)


    

    




[[[ 0  1  2  3]
  [ 4  5  6  7]
  [ 8  9 10 11]]

 [[12 13 14 15]
  [16 17 18 19]
  [20 21 22 23]]]

In [13]:

    

print(len(a_3d))


    

    




2

In [14]:

    

import pandas as pd


    

In [15]:

    

df = pd.DataFrame({'A': [0, 1, 2], 'B': [3, 4, 5]}, index=['a', 'b', 'c'])

print(df)


    

    




   A  B
a  0  3
b  1  4
c  2  5

In [16]:

    

print(len(df))


    

    




3

In [17]:

    

s = pd.Series([0, 1, 2], index=['a', 'b', 'c'])

print(s)


    

    




a    0
b    1
c    2
dtype: int64

In [18]:

    

print(len(s))


    

    




3

In [19]:

    

# print(len(100))
# TypeError: object of type 'int' has no len()


    

In [20]:

    

# print(len(0.1))
# TypeError: object of type 'float' has no len()


    

In [21]:

    

# print(len(True))
# TypeError: object of type 'bool' has no len()