Pandas -复制行和切片字符串

import pandas as pd

# 创建一个DataFrame
data = {'Name': ['Alice', 'Bob', 'Charlie'],
        'Age': [25, 30, 35]}
df = pd.DataFrame(data)

# 复制行
df_copy = df.copy()

# 打印复制的DataFrame
print(df_copy)

      Name  Age
0    Alice   25
1      Bob   30
2  Charlie   35

import pandas as pd

# 创建一个DataFrame
data = {'Name': ['Alice', 'Bob', 'Charlie'],
        'Age': [25, 30, 35]}
df = pd.DataFrame(data)

# 提取Name列的子字符串
df['Name'] = df['Name'].str[1:4]

# 打印DataFrame
print(df)

  Name  Age
0  lic   25
1  ob    30
2  har   35