python中的字符串到浮点转换错误

Question

import csv
import numpy as np
from matplotlib import pyplot as plt

scT, county, scC, n, nMMR, nDTP, nPolio,nPBE,nPME,year = np.loadtxt('studentsdata.txt')

scT = []
county = []
scC = []
n = []
nMMR = []
nDTP = []
nPolio = []
nPBE = []
nPME = []
year = []
with open('studentsdata.txt') as students:
    datacols = csv.reader(students, delimiter=',')
    for row in datacols:
       scT.append(int(float(row[0].strip())))

文件“ C：\ ProgramData \ Anaconda3 \ lib \ site-packages \ numpy \ lib \ npyio.py”，行1028，在read_data中     items = [zip（converters，vals）中的（conv，val）的conv（val）]

文件“ C：\ ProgramData \ Anaconda3 \ lib \ site-packages \ numpy \ lib \ npyio.py”，行1028，在     items = [zip（converters，vals）中的（conv，val）的conv（val）]

floatconv中的行“ C：\ ProgramData \ Anaconda3 \ lib \ site-packages \ numpy \ lib \ npyio.py”     返回float（x）

ValueError：无法将字符串转换为float：

Answer 1

拆分时，您的值可能包含空格。所以试试这个 float(int((row[0].split(',')).strip())) strip（）将删除空格