小编use*_*537的帖子

我正在努力完成一个数学问题,它使用Newton的猜测和检查方法来近似数字的平方根.用户应该输入一个数字,该数字的初始猜测,以及他们想要在返回之前检查他们的答案的次数.为了让事情变得更容易并且了解Python(我几个月前才开始学习这门语言),我把它分解成了许多小函数; 但现在的问题是,我无法调用每个函数并传递数字.

这是我的代码,有帮助的注释(每个函数按使用顺序):

# This program approximates the square root of a number (entered by the user)
# using Newton's method (guess-and-check). I started with one long function,
# but after research, have attempted to apply smaller functions on top of each
# other.
# * NEED TO: call functions properly; implement a counting loop so the
# goodGuess function can only be accessed the certain # of times the user
# specifies. Even if the - .001 range isn't …

我在这里使用类来输入分数（给定分子和分母时），以及将两个分数相加和相乘。由于某些原因，导入的分数模块仅对程序的一部分有效。gcd方法有效，但是Fraction方法（给定两个数字时，将其转换为小数格式）不起作用，而是引发NameError（具体来说，“未定义全局名称'Fractions'”）。

我究竟做错了什么？我对Python还是比较陌生，关于如何使该代码更紧密，更多异常的任何建议将不胜感激。

这是我的代码：

import fractions

class FractionClass:
    # Initialize starting numerator and denominator.
    n = 0
    d = 0
    def __init__(self, numerator, denominator):
        self.n = numerator
        self.d = denominator

    # Function that adds fractions, whichs throws NameError if gcd() doesn't work!  
    def add_fractions(self, other):
        try:
            sum_numerator = self.n + other.n
            sum_denominator = fractions.gcd(self.d, other.d)
            return(sum_numerator, sum_denominator)
        except NameError:
            print("Methods aren't defined.")

    # Function that multiplies fractions, whichs throws NameError if gcd() doesn't work!    
    def multiply_fractions(self, other):
        try:
            product_numerator = self.n …

我正在尝试完成一个简单的字数统计程序,它可以跟踪连接文件中的单词,字符和行数.

   # This program counts the number of lines, words, and characters in a file, entered by the user.
   # The file is test text from a standard lorem ipsum generator.
   import string
   def wc():
      # Sets the count of normal lines, words, and characters to 0 for proper iterative operation.
        lines = 0
        words = 0
        chars = 0
        print("This program will count the number of lines, words, and characters in a file.")
       # Stores a variable as a …