在for-loop内部时无法识别批量fc

Question

我是批量初学者。我想使用 fc 比较for循环中的两个文本文件。我写了以下代码：

'fc' is not recognized as an internal or external command,
operable program or batch file.

我收到错误：

try:
    myFile=open("zipcodes.txt") #Tries to open file user entered
except: 
    print "File can't be opened:", myFile #If input is invalid filename, print error
    exit()

zipcode = dict() #List to store individual sentences
line = myFile.readline() #Read each line of entered file

ask = raw_input("Enter a zip code: ")

if ask not in line:
    print "Not Found."
else:
    for line in myFile:
       words = line.split()
       if words[2] == ask:
          zipcode = words[0:2]
for value in zipcode:
    print value,

当我在循环外执行时，一切正常。这里的问题是什么？