Python closures are dangerous

closure_madness_in_python

# SCALA


scala> val fs = List(1, 2, 3).map(i => () => i)
val fs: List[() => Int] = List($Lambda$2341/0x00000008408e7c40@64518270, $Lambda$2341/0x00000008408e7c40@3b7c58e7, $Lambda$2341/0x00000008408e7c40@79627d27)


scala> fs.foreach(x => println(x()))
1
2
3


--------

# PYTHON


fs = []
for i in range(3):
    c = i
    fs.append(lambda: c)

fs
Out[5]: 
[<function __main__.<lambda>()>,
 <function __main__.<lambda>()>,
 <function __main__.<lambda>()>]
 
for f in fs:
    print(f())
    
2
2
2