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Add option to update dataset silently

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This commit is contained in:
Emmy D'Anello
2023-02-13 13:12:39 +01:00
parent 4f326626bf
commit 9fbf4fb172
1 changed files with 36 additions and 31 deletions
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67
app.py
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@@ -1,5 +1,6 @@
#!/usr/bin/env python3
from contextlib import nullcontext
import csv
from datetime import date, datetime, time, timedelta
import os
@@ -59,54 +60,58 @@ class RouteQueue(db.Model):
@cli.command("update-dataset")
def update_dataset():
@click.option('--verbose', '-v', is_flag=True, help="Display errors.")
def update_dataset(verbose: bool = False):
"""
Query the latest version of the SNCF OpenData dataset, as a CSV file.
"""
try:
resp = requests.get('https://ressources.data.sncf.com/explore/dataset/tgvmax/information/')
content = resp.content.decode().split('<script type="application/ld+json">')[1].split('</script>')[0].strip()
content = content.replace('\r', '')
content = content.replace('" \n', '" \\n')
content = content.replace('.\n', '.\\n')
content = content.replace('\n\n \nLa', '\\n\\n \\nLa')
content = content.replace('\n"', '\\n"')
resp = requests.get('https://ressources.data.sncf.com/explore/dataset/tgvmax/information/')
content = resp.content.decode().split('<script type="application/ld+json">')[1].split('</script>')[0].strip()
content = content.replace('\r', '')
content = content.replace('" \n', '" \\n')
content = content.replace('.\n', '.\\n')
content = content.replace('\n\n \nLa', '\\n\\n \\nLa')
content = content.replace('\n"', '\\n"')
info = json.loads(content)
modified_date = datetime.fromisoformat(info['dateModified'])
info = json.loads(content)
modified_date = datetime.fromisoformat(info['dateModified'])
utc = timezone('UTC')
last_modified = datetime.utcfromtimestamp(os.path.getmtime('tgvmax.csv')).replace(tzinfo=utc) if os.path.isfile(
'tgvmax.csv') else datetime(1, 1, 1, tzinfo=utc)
utc = timezone('UTC')
last_modified = datetime.utcfromtimestamp(os.path.getmtime('tgvmax.csv')).replace(tzinfo=utc) if os.path.isfile(
'tgvmax.csv') else datetime(1, 1, 1, tzinfo=utc)
if last_modified < modified_date:
if last_modified < modified_date:
if verbose:
print("Updating tgvmax.csv…")
with requests.get(info['distribution'][0]['contentUrl'], stream=True) as resp:
resp.raise_for_status()
with open('tgvmax.csv', 'wb') as f:
with tqdm(unit='io', unit_scale=True) as t:
for chunk in resp.iter_content(chunk_size=512 * 1024):
if chunk:
f.write(chunk)
with requests.get(info['distribution'][0]['contentUrl'], stream=True) as resp:
resp.raise_for_status()
with open('tgvmax.csv', 'wb') as f:
with tqdm(unit='io', unit_scale=True) if verbose else nullcontext() as t:
for chunk in resp.iter_content(chunk_size=512 * 1024):
if chunk:
f.write(chunk)
if verbose:
t.update(len(chunk))
os.utime('tgvmax.csv', (modified_date.timestamp(), modified_date.timestamp()))
os.utime('tgvmax.csv', (modified_date.timestamp(), modified_date.timestamp()))
if verbose:
print("Done")
print("Last modification:", modified_date)
except Exception as e:
print("An error occured while updating tgvmax.csv")
print(e)
else:
if verbose:
print("Last modification:", modified_date)
exit(2)
@cli.command("parse-csv")
@click.option('-F', '--flush', type=bool, is_flag=True, help="Flush the database before filling it.")
def parse_trains(flush: bool = False):
@click.option('--verbose', '-v', is_flag=True, help="Display errors.")
def parse_trains(flush: bool = False, verbose: bool = False):
"""
Parse the CSV file and store it to the database.
"""
if flush:
print("Flush database…")
if verbose:
print("Flush database…")
db.session.query(Train).delete()
last_modification = datetime.utcfromtimestamp(os.path.getmtime('tgvmax.csv')).replace(tzinfo=timezone('UTC'))
@@ -114,7 +119,7 @@ def parse_trains(flush: bool = False):
with open('tgvmax.csv') as f:
first_line = True
already_seen = set()
for line in tqdm(csv.reader(f, delimiter=';')):
for line in (tqdm if verbose else lambda x: x)(csv.reader(f, delimiter=';')):
if first_line:
first_line = False
continue