根据Python中的值对数字列表进行分类 [英] Classify a list of numbers based on their values in Python

问题描述

我正在尝试在python中编写一个循环，该循环读取50个数字的文本文件，并对数字进行排序，然后根据其值将它们分配给不同的变量.我希望变量A包含小于2的值，变量B包含2到2.1的值，变量c包含2.1到2.25的值，变量d包含2.25到2.5的值，变量e包含从2到2.5的值. 2.25至2.5.

I am trying to write a loop in python that reads a text file of 50 numbers and sorts through the numbers and assigns them to different variables based on their values. I would like variable A to contain values less than 2, variable B to to contain values from 2 to 2.1, Variable c to contain values from 2.1 to 2.25, variable d to contain values from 2.25 to 2.5, and variable e to contain values from 2.25 to 2.5.

到目前为止，我的代码如下:

My code so far looks like this:

import os
import numpy
os.chdir('/Users/DevEnv')

dispFile = open('output1.txt')
displacement = dispFile.readlines()
dispFile.close()

displacement = [float(i.strip()) for i in displacement]


for i in range (0,50):
   displacementval = displacement[i]
   if i<2 displacementval()=a():

但是，当我尝试运行此命令时，出现无效的语法错误.我是python和程序设计的新手，将不胜感激！

However, when I try to run this I get an invalid syntax error. I am new to python and programming and would appreciate any help!

推荐答案

您需要将变量a，b，c，d和e初始化为

You need to initialize variables a, b, c, d, and e as list:

import os
import numpy
os.chdir('/Users/DevEnv')

dispFile = open('output1.txt')
displacement = dispFile.readlines()
dispFile.close()

displacement = [float(i.strip()) for i in displacement]

a = []
b = []
c = []
d = []
e = []

for displacementval in displacement:
   if displacementval < 2:
        a.append(displacementval)
   elif displacementval < 2.1:
        b.append(displacementval)
   # ... the rest is similar, so omitted
print a
print b

我建议您阅读官方的 Python教程，这样您就可以首先是Python语法的想法.

I would suggest reading the official Python tutorial, so you get an idea of Python syntax first.

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