引用函数内 "with open" 块内的变量
Reference a variable that is inside a "with open" block inside a function
def write_lor():
with open("data.txt", 'r+') as filehandle:
filecontents = filehandle.readlines()
filehandle.seek(0)
new = (int(filecontents[0])+1)
filehandle.write(str(new))
filehandle.truncate()
这是一种基本的计数器类型的系统,可以保存到 txt。无论如何要在后面引用变量 new
吗?比如我的用法是:
button1 = Button(frame, text=("Left On Read:\n", **VARIABLE**), fg="black", bg="white", height = 5, width = 20, command=write_lor)
变量需要是上面函数中引用的变量new
。
def write_lor():
with open("data.txt", 'r+') as filehandle:
filecontents = filehandle.readlines()
filehandle.seek(0)
global lor
lor = (int(filecontents[0])+1)
filehandle.write(str(lor)+ "\n")
def write_lor():
with open("data.txt", 'r+') as filehandle:
filecontents = filehandle.readlines()
filehandle.seek(0)
new = (int(filecontents[0])+1)
filehandle.write(str(new))
filehandle.truncate()
这是一种基本的计数器类型的系统,可以保存到 txt。无论如何要在后面引用变量 new
吗?比如我的用法是:
button1 = Button(frame, text=("Left On Read:\n", **VARIABLE**), fg="black", bg="white", height = 5, width = 20, command=write_lor)
变量需要是上面函数中引用的变量new
。
def write_lor():
with open("data.txt", 'r+') as filehandle:
filecontents = filehandle.readlines()
filehandle.seek(0)
global lor
lor = (int(filecontents[0])+1)
filehandle.write(str(lor)+ "\n")