如何遍歷熊貓數據框列中的元素？

Question

如何找出熊貓數據框的列中存在的每個元素？ 我願做這樣的事情：

for item in column: 
    print("usercode = " + item) 

# OUTPUT: 
# usercode = key00 
# usercode = key01 
# usercode = key02 

數據幀是這樣的：

 USERCODES NAMES 
0 key00  ab00 
1 key01  cd01 
2 key02  ef02 

Answer 1

以及在列中的每個值使用Series.apply：

def f(item): 
    print("usercode = " + item) 

df['NAMES'].apply(f) 
usercode = ab00 
usercode = cd01 
usercode = ef02 

一號線：

df['NAMES'].apply(lambda item: print("usercode = " + item)) 

usercode = ab00 
usercode = cd01 
usercode = ef02 

Simpliest：

for item in df['NAMES']: 
    print("usercode = " + item) 

usercode = ab00 
usercode = cd01 
usercode = ef02