dataframe中如何将文本拆分为两个单独的列？

df = pd.DataFrame(["STD, City    State",
"33, Kolkata    West Bengal",
"44, Chennai    Tamil Nadu",
"40, Hyderabad    Telengana",
"80, Bangalore    Karnataka"], columns=['row'])

print(df)
# expand=True表示以分割符把字符串分成两列
df_out = df.row.str.split(',|\t', expand=True)

# 获取新的列
new_header = df_out.iloc[0]
# 重新赋值
df_out = df_out[1:]
df_out.columns = new_header
print(df_out)
#>	                          row
	0          STD, City    State
	1  33, Kolkata    West Bengal
	2   44, Chennai    Tamil Nadu
	3  40, Hyderabad    Telengana
	4  80, Bangalore    Karnataka

#>	0 STD     City       State
	1  33   Kolkata    West Bengal
	2  44    Chennai    Tamil Nadu
	3  40   Hyderabad    Telengana
	4  80   Bangalore    Karnataka