Created
September 26, 2020 23:16
-
-
Save trenton3983/e5a1e4e46058ad5de2c1ca7a74b28840 to your computer and use it in GitHub Desktop.
read csv, format date, sort by date, add header, write to file, without pandas
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
with open('test.csv', mode='r+', newline='') as f: | |
data = list(csv.reader(f)) | |
for i, v in enumerate(data): | |
v[0] = datetime.strptime(v[0], "%d-%b-%y").date().strftime('%Y-%m-%d') | |
data[i] = v | |
data = sorted(data, key=lambda row: datetime.strptime(row[0], '%Y-%m-%d')) | |
writer = csv.writer(f) | |
header = ['date', 1, 2, 3, 4, 5] | |
f.seek(0) | |
f.truncate() | |
writer.writerow(header) | |
writer.writerows(data) |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment