pandas 案例续集1[color=rgba(0, 0, 0, 0.3)]以下文章来源于萝卜大杂烩[color=rgba(0, 0, 0, 0.3)] [color=rgba(0, 0, 0, 0.3)]，作者周萝卜
[color=rgba(0, 0, 0, 0.3)]5如何获取 Series 的大小和形状import pandas as pd

values = ["India", "Canada", "Australia",
          "Japan", "Germany", "France"]

code = ["IND", "CAN", "AUS", "JAP", "GER", "FRA"]

ser1 = pd.Series(values, index=code)

print(len(ser1))

print(ser1.shape)

print(ser1.size)

Output:

6
(6,)
6
6如何获取 Series 开始或末尾几行数据Head()import pandas as pd

values = ["India", "Canada", "Australia",
          "Japan", "Germany", "France"]

code = ["IND", "CAN", "AUS", "JAP", "GER", "FRA"]

ser1 = pd.Series(values, index=code)

print("-----Head()-----")
print(ser1.head())

print("\n\n-----Head(2)-----")
print(ser1.head(2))

Output:

-----Head()-----
IND        India
CAN       Canada
AUS    Australia
JAP        Japan
GER      Germany
dtype: object


-----Head(2)-----
IND     India
CAN    Canada
dtype: object
Tail()import pandas as pd

values = ["India", "Canada", "Australia",
          "Japan", "Germany", "France"]

code = ["IND", "CAN", "AUS", "JAP", "GER", "FRA"]

ser1 = pd.Series(values, index=code)

print("-----Tail()-----")
print(ser1.tail())

print("\n\n-----Tail(2)-----")
print(ser1.tail(2))

Output:

-----Tail()-----
CAN       Canada
AUS    Australia
JAP        Japan
GER      Germany
FRA       France
dtype: object


-----Tail(2)-----
GER    Germany
FRA     France
dtype: object
Take()import pandas as pd

values = ["India", "Canada", "Australia",
          "Japan", "Germany", "France"]

code = ["IND", "CAN", "AUS", "JAP", "GER", "FRA"]

ser1 = pd.Series(values, index=code)

print("-----Take()-----")
print(ser1.take([2, 4, 5]))

Output:

-----Take()-----
AUS    Australia
GER      Germany
FRA       France
dtype: object
7使用切片获取 Series 子集import pandas as pd

num = [000, 100, 200, 300, 400, 500, 600, 700, 800, 900]

idx = ['A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J']

series = pd.Series(num, index=idx)

print("\n [2:2] \n")
print(series[2:4])

print("\n [1:6:2] \n")
print(series[1:6:2])

print("\n [:6] \n")
print(series[:6])

print("\n [4:] \n")
print(series[4:])

print("\n [:4:2] \n")
print(series[:4:2])

print("\n [4::2] \n")
print(series[4::2])

print("\n [::-1] \n")
print(series[::-1])

Output

[2:2]

C    200
D    300
dtype: int64

[1:6:2]

B    100
D    300
F    500
dtype: int64

[:6]

A      0
B    100
C    200
D    300
E    400
F    500
dtype: int64

[4:]

E    400
F    500
G    600
H    700
I    800
J    900
dtype: int64

[:4:2]

A      0
C    200
dtype: int64

[4::2]

E    400
G    600
I    800
dtype: int64

[::-1]

J    900
I    800
H    700
G    600
F    500
E    400
D    300
C    200
B    100
A      0
dtype: int64