Question

当我尝试在python IDLE中运行代码时，它给出了第一行的语法错误，不知道为什么。试图让代码写入实验室的文本文档

Rfile=open (r 'C:\\Users\\cgeeg\\Desktop\\New_folder\\receipt.txt' )

file.write('Name:' )
file.write('Total Stock:' )
file.write('Commission:')
file.write('Total amount:' )
file.write('Net worth in Year(s:')
file.close()

myreceipt=f.readline()

A=float(Rfile.readline())
B=float(Rfile.readline())
C=float(Rfile.readline())
D=float(Rfile.readline())
E=float(Rfile.readline())


P=A*B
CT=P*C/ 100
T=CT+P
Y=P*(1+D/100)**10

print('Price paid for the stock alone is', P)
print('The amount of commission is', CT)
print('Total amount paid is', T)
print('After '+ E + ' years, your shares will be worth:', Y)

opt=input('Would you like a receipt? Yes or No?')

if opt=='Yes':
  file=open('receipt.txt','w')

else:
   print("Have a nice day")

Answer 1

r之后应该没有空格：

r'C:\\Users\\cgeeg\\Desktop\\New_folder\\receipt.txt'

一旦你解决了这个问题，你就会遇到另一个问题：如果你使用r，你就不需要加倍反斜杠了。相反，如果你加倍反斜杠，你就不需要r。所以试试这个：

r'C:\Users\cgeeg\Desktop\New_folder\receipt.txt'

Answer 2

以正确的语法开头：

如果您使用r'...'，则无需在\之前屏蔽\\，并且在r和＆＃39;
如果要写入文件，请为文件指定"a"（追加）或"r+"（读取+写入）或"w"（删除+写入）。

在此处阅读更多内容：https://docs.python.org/3/tutorial/inputoutput.html#reading-and-writing-files

# change to 'w' instead of "r+" if does not yet exists or 
# should be recreated each time deleting its content.
with open (r'C:\Users\cgeeg\Desktop\New_folder\receipt.txt',"r+" ) as f: 
    f.write('Name:\n' )
    f.write('Total Stock:\n' )
    f.write('Commission:\n')
    f.write('Total amount:\n' )
    f.write("Net worth in Year's:\n")

＃autocloses here。

尝试创建读/写文件但不断收到语法错误

2 个答案: