如何调试“str object is not callable”？

Question

again = True
minimum = 8
errorcount = 0
digitm = 2

while again == True:

  password = input('Enter a Password:')

  passwords = len(password)

  if passwords < minimum:
      errorcount += 1

  numblet = 0
  numbdig = 0
  blank = 0
  numblower = 0
  numbup = 0


  for n in range(0, passwords):
      if password(n).isalpha():
          numblet += 1
      if password(n).isdigit():
          numbdig += 1
      if password(n).isspace():
          blank += 1
      if password(n).islower():
          numblower += 1
      if password(n).isupper():
          numbup += 1

我不明白为什么我得到str对象是不可调用的，我试图让输入检查，如果有至少1个大写和小写字母，至少2位数字，没有空格，以一个字母开始。你知道吗

Answer 1

Python中的字符串索引是使用[]而不是()完成的。你知道吗

again = True
minimum = 8
errorcount = 0
digitm = 2

while again == True:

  password = input('Enter a Password:')

  passwords = len(password)

  if passwords < minimum:
      errorcount += 1

  numblet = 0
  numbdig = 0
  blank = 0
  numblower = 0
  numbup = 0

  for n in range(0, passwords):
      if password[n].isalpha():
          numblet += 1
      if password[n].isdigit():
          numbdig += 1
      if password[n].isspace():
          blank += 1
      if password[n].islower():
          numblower += 1
      if password[n].isupper():
          numbup += 1