在python中定义变量

Question

我试图在python中从pdf转换到word，所以我有两个函数--一个用于转换文件，另一个用于保存文件。我想知道如何在这两个函数中定义一个变量:在这里，我所写的是，docx_file给了我在转换函数中没有定义的错误。

def convert():
    try:
        pdf = fileEntry.get()
        cv = Converter(pdf)
        cv.convert(docx_file, start=0, end=None)
        cv.close()
        if docx_file is None:
            return
           
    except FileNotFoundError:
        fileEntry.delete(0,END)
        fileEntry.config(fg="red")
        fileEntry.insert(0,"Please select a pdf file first")
    except:
        pass
    
def save2word():

    docx_file = asksaveasfile(mode='w',defaultextension=".docx", filetypes=[("word file","*.docx"), ("text file","*.txt")])
    docx_file.write()
    docx_file.close()
    
    if docx_file is None:
        return
    
    print("saved")
    fileEntry.delete(0,END)
    fileEntry.insert(0,"pdf Extracted and Saved...")

Answer 1

可以尝试声明一个空白变量。

docx_file = ""    
def convert():
    try:
        pdf = fileEntry.get()
        cv = Converter(pdf)
        cv.convert(docx_file, start=0, end=None)
        cv.close()
        if docx_file is None:
            return

或将变量设置为全局变量。

def convert():
    try:
        pdf = fileEntry.get()
        cv = Converter(pdf)
        cv.convert(docx_file, start=0, end=None)
        cv.close()
        global docx_file
        if docx_file is None:
            return