爲什麼這是無效的語法？

Question

這是爲什麼抱怨無效的語法？

#! /usr/bin/python 

recipients = [] 
recipients.append('chris@elserinteractive.com') 

for recip in recipients: 
    print recip 

我不斷收到：

Answer 1

如果您正在使用Python 3 print是一個函數。像這樣稱呼：print(recip)。

Answer 2

如果它是Python 3,print現在是一個函數。正確的語法是

print (recip) 

Answer 3

在python 3中，print不再是一個語句，而是一個function。

Old: print "The answer is", 2*2 
New: print("The answer is", 2*2) 

更多蟒蛇3 print功能：

Old: print x,   # Trailing comma suppresses newline 
New: print(x, end=" ") # Appends a space instead of a newline 

Old: print    # Prints a newline 
New: print()   # You must call the function! 

Old: print >>sys.stderr, "fatal error" 
New: print("fatal error", file=sys.stderr) 

Old: print (x, y)  # prints repr((x, y)) 
New: print((x, y))  # Not the same as print(x, y)!