我无法理解的 `if` 语句中的无效语法错误?

Invalid syntax error in an `if` statement which I am unable to understand?

我逐行查看并遇到了这个错误。

SyntaxError: invalid syntax

其中,emailRegex 被突出显示

if cell.value and isinstance(cell.value, str) emailRegex.match(cell.value):

完整代码(python3.x)

import re, openpyxl, os, sys
def sort_email_from_xl():
    loc = input("Please enter path of the file:")
    os.chdir(loc)
    file = input("Filename:")
    wb = openpyxl.load_workbook(file, use_iterators=True)
    sheet = input("Which Sheet do you want to email?\n")
    return sheet
    wb.get_sheet_by_name(sheet)
    ws = wb.get_sheet_by_name(sheet)
    emailRegex = re.compile(r".*?([a-zA-Z0-9\._%+\-]+@[a-zA-Z0-9.\-]+\.[a-zA-Z]{2,4}).*?")
    customeremails = []        #works fine till here in idle
for row in ws.iter_rows():
    for cell in row:
        if cell.value and isinstance(cell.value, str) emailRegex.match(cell.value):
            mail = emailRegex.match(cell.value)
            if mail:
                mail = mail.group(0) # use parentheses to call the function 
                cell.text = mail
                customeremails.append(mail)

print(customeremails)

谁能指出一个资源,我可以从中了解到底出了什么问题?在 SO 的帮助和阅读文档的帮助下,我已经尝试整理这个功能近 12 个小时了。

当前错误后代码是否正常?

谢谢

您错过了谓词之间的 and

if cell.value and isinstance(cell.value, str) and emailRegex.match(cell.value):
                                              ^^^