Python编写浮入csv

Question

I am writing some data into a csv with Python. I have two values, downloadSpeed and uploadSpeed . When the value of the data is < 1 it is written into the csv file properly ( 0.58795654 becames 0.58795654 ). However, when the data is >1, float value is converted into an integer ( 2.58795654 becames 258795654 ). This is my code:

with open(data_file_path, 'a+', newline='') as csvfile:
 file = csv.writer(csvfile, delimiter=';')
 file.writerow([date,downloadSpeed, uploadSpeed])

One solution I have come up with is converting the float to String, and then writing the string replacing the '.' for ','. However, after some reading, I don´t know why was this happening.

Solution:

file.writerow([date, str(downloadSpeed).replace(".",","), str(uploadSpeed).replace(".",",")])

Edit:

The problem is that Excel accepts both , and . as separators for floats < 1 but only accepts , as separator for floats > 1. That is why I was getting the error.

Answer 1

This seems to be working

import csv
import datetime

date = datetime.datetime.now()
downloadSpeed = 2.58795654
uploadSpeed = 0.2261624210544645

with open("test.csv", "a+", newline='') as file:
    writer = csv.writer(file, delimiter=';')
    writer.writerow([date,downloadSpeed, uploadSpeed])

Output is: 2018-05-02 15:58:38.294086;2.58795654;0.2261624210544645

Are you altering the numbers in some way before writing?