有人可以解释为什么我的列表仍然是typeError＆＃39; NoneType＆＃39 ;?过去一小时我一直坚持这一点。
即使我写了f（[1,2,3]），它也告诉我它是NoneType。
谢谢。
<type 'list'>
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
<ipython-input-64-6f4003fa2858> in <module>()
415 TotalTime = 0
416 RandExtNumbList = []
--> 417 fc, PeriodNumbers,TotalTime,RandExtNumbList = f(Chosen_Columns_best_result[:])
418
419 ########################################################################
TypeError: 'NoneType' object is not iterable
def f(var):
for i in range(0,len(var)):
# Whole lot of code
return TotalValue, Period_Numbers_per_Column, Time, ListRandExt
Chosen_Columns_best_result = ([254, 255, 243, 242, 225, 226, 203, 202, 201, 224, 241, 253, 262, 261, 252, 240, 239, 238, 237, 236, 246, 247, 248, 249, 250, 258, 257, 256, 235, 234, 233, 232, 215, 216, 217, 218, 219, 220, 197, 169, 143, 168, 196, 195, 167, 142, 166, 194, 193, 192, 164, 165, 191, 214, 190, 189, 188, 198, 199, 200, 174, 173, 172, 171, 170, 145, 146, 147, 148, 149, 150, 151, 126, 125, 124, 123, 122, 121, 144, 221, 222, 223, 176, 204, 227, 244, 245, 228, 205, 177, 153, 178, 206, 229, 230, 207, 179, 154, 155, 180, 208, 231, 209, 181, 156, 132, 157, 182, 210, 211, 183, 158, 133, 110, 109, 108, 89, 90, 91, 92, 111, 134, 159, 184, 212, 213, 185, 186, 187, 163, 162, 161, 160, 135, 136, 137, 138, 139, 116, 115, 114, 113, 112, 93, 94, 95, 96, 97, 78, 77, 76, 75, 74, 73, 72, 55, 56, 57, 58, 59, 60, 61, 62, 80, 79, 98, 99, 118, 117, 140, 141, 119, 100, 81, 63, 47, 48, 64, 82, 101, 120, 102, 83, 65, 49, 35, 36, 50, 66, 84, 85, 67, 51, 37, 25, 24, 23, 22, 21, 30, 31, 32, 33, 34, 46, 45, 44, 43, 42, 71, 70, 88, 87, 86, 107, 106, 105, 104, 103, 127, 152, 128, 129, 130, 131, 175, 68, 69, 53, 52, 38, 39, 27, 26, 16, 17, 18, 19, 20, 12, 11, 10, 9, 8, 4, 5, 6, 3, 2, 7, 13, 1, 29, 41, 54, 40, 28, 15, 14])
print type(Chosen_Columns_best_result)
DistancePenalty = 96
SCI4 = 1
fc = 0
PeriodNumbers = []
TotalTime = 0
RandExtNumbList = []
fc, PeriodNumbers,TotalTime,RandExtNumbList = f(Chosen_Columns_best_result[:])
答案 0 :(得分：0)
你忘了从你的功能中归还任何东西。如果没有显式返回任何内容，则返回None。
答案 1 :(得分：0)
检查 f 函数是否返回了某些内容！使用此代码我得到了相同的错误
def f(var):
# stuff
if False:
return TotalValue, Period_Numbers_per_Column, Time, ListRandExt
# CHECK ANY POSSIBLE PATH to see if return those values
Chosen_Columns_best_result = ([254, 255, 243, 242, 225, 226, 203, 202, 201, 224, 241, 253, 262, 261, 252, 240, 239, 238, 237, 236, 246, 247, 248, 249, 250, 258, 257, 256, 235, 234, 233, 232, 215, 216, 217, 218, 219, 220, 197, 169, 143, 168, 196, 195, 167, 142, 166, 194, 193, 192, 164, 165, 191, 214, 190, 189, 188, 198, 199, 200, 174, 173, 172, 171, 170, 145, 146, 147, 148, 149, 150, 151, 126, 125, 124, 123, 122, 121, 144, 221, 222, 223, 176, 204, 227, 244, 245, 228, 205, 177, 153, 178, 206, 229, 230, 207, 179, 154, 155, 180, 208, 231, 209, 181, 156, 132, 157, 182, 210, 211, 183, 158, 133, 110, 109, 108, 89, 90, 91, 92, 111, 134, 159, 184, 212, 213, 185, 186, 187, 163, 162, 161, 160, 135, 136, 137, 138, 139, 116, 115, 114, 113, 112, 93, 94, 95, 96, 97, 78, 77, 76, 75, 74, 73, 72, 55, 56, 57, 58, 59, 60, 61, 62, 80, 79, 98, 99, 118, 117, 140, 141, 119, 100, 81, 63, 47, 48, 64, 82, 101, 120, 102, 83, 65, 49, 35, 36, 50, 66, 84, 85, 67, 51, 37, 25, 24, 23, 22, 21, 30, 31, 32, 33, 34, 46, 45, 44, 43, 42, 71, 70, 88, 87, 86, 107, 106, 105, 104, 103, 127, 152, 128, 129, 130, 131, 175, 68, 69, 53, 52, 38, 39, 27, 26, 16, 17, 18, 19, 20, 12, 11, 10, 9, 8, 4, 5, 6, 3, 2, 7, 13, 1, 29, 41, 54, 40, 28, 15, 14])
print type(Chosen_Columns_best_result)
DistancePenalty = 96
SCI4 = 1
fc = 0
PeriodNumbers = []
TotalTime = 0
RandExtNumbList = []
fc, PeriodNumbers,TotalTime,RandExtNumbList = f(Chosen_Columns_best_result[:])