如何将一组float的python脚本的输出写入文本文件？

Question

I have a python script which prints the first 105 columns of a text file. All the values are float and I want to write the list into a text file. I tried the code below, but the text file is empty.

import pandas as pd
import numpy as np
import matplotlib.pyplot as plt
import sys

data = pd.read_csv('E:\Python_trials\Trial_codes\Lab_trial.txt', delimiter = '\t')
df = data.ix[:,:110]
print(df)

with open("test.txt", "w") as f:
    sys.stdout.writelines(str(f))
    f.flush()
    f.close()

Answer 1

You dont write to f . You are writing to standard output. Try f.write(...)

import pandas as pd
import numpy as np
import matplotlib.pyplot as plt
import sys

data = pd.read_csv('E:\Python_trials\Trial_codes\Lab_trial.txt', delimiter = '\t')
df = data.ix[:,:110]
print(df)

with open("test.txt", "w") as f:
    f.write(str(f))
    # f.close() This is useless, as soon as the "with" is over, it automatically closes the file