Difference between revisions of "FileIO"
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| Line 25: | Line 25: | ||
# Use a context manager to handle the file | # Use a context manager to handle the file | ||
| + | import os | ||
| + | |||
with open('datafile02.txt', 'a') as file: | with open('datafile02.txt', 'a') as file: | ||
for i in range(100): | for i in range(100): | ||
| Line 31: | Line 33: | ||
print(str(i) + "; " + str(random_integer)) | print(str(i) + "; " + str(random_integer)) | ||
</syntaxhighlight> | </syntaxhighlight> | ||
| − | |||
= Read to File = | = Read to File = | ||
Revision as of 19:42, 1 June 2024
Description
Write and read files using MircoPython.
Write to File
1 # write 100 random values to a file
2 import random
3 import os
4
5 file = open('datafile01.txt', 'a')
6 for i in range(100):
7 random_integer = random.randint(1, 1000)
8 file.write(str(i) + "; " + str(random_integer) + "\n")
9 print(str(i) + "; " + str(random_integer))
10 file.close()
Or and alternative: here the file is closed automatically when the block inside the with statement is exited.
1 # write 100 random values to a fileimport random
2
3 # Use a context manager to handle the file
4 import os
5
6 with open('datafile02.txt', 'a') as file:
7 for i in range(100):
8 random_integer = random.randint(1, 1000)
9 file.write(str(i) + "; " + str(random_integer) + "\n")
10 print(str(i) + "; " + str(random_integer))
Read to File
1 # Read the file
2 with open('datafile01.txt', 'r') as file:
3 for line in file:
4 columns = line.strip().split('; ')
5 print(columns[1] + " is the value at: " + columns[0])
