我的验证是为了检查我加载到程序中的文件是否是正方形不起作用,我不知道为什么并且想要一些帮助+指导和解释以便我可以学习。
问题是将文件加载到python中,然后检查文件是否为nxn square。
我做错了什么,我该如何解决?
代码:
while True:
try:
filesname = input("Enter the filename:") + ".txt"
file = open(filesname,"r")
readFile = file.readlines()
file.close()
print ("File has:")
thelist = []
square(thelist)
for line in readFile:
thelist.append(line)
print (line, end="")
square(thelist)
except:
print ("The file name you have entered does not exist. Please try again.")
except:
print ("")
print ("Incorrect file format")
else:
break
我得到了它,但是当我运行程序时,我得到了:
File contents:
---------------
ABC
BAC
CAB
LJ
Incorrect file format
Enter the filename:
这是有效的,但是如何更改程序,以便在文件格式不正确的情况下甚至不打印文件?我试过玩它并且无法解决它。
答案 0 :(得分:0)
您需要在打印之前致电square()
:
while True:
try:
filesname = input("Enter the filename:") + ".txt"
file = open(filesname,"r")
readFile = file.readlines()
file.close()
thelist = [line.strip() for line in readFile]
square(thelist)
print ("File has:")
print("\n".join(thelist))
except FileNotFoundError:
print ("The file name you have entered does not exist. Please try again.")
except ValueError:
print ("")
print ("Incorrect file format")
else:
break