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Code Issues Releases Wiki Activity

assert Pandas + Timezones == Pain

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This commit is contained in:
Bradlee Speice 2016-08-09 23:39:30 -04:00
parent 4dd3315d2c
commit 54ab89acff
1 changed files with 10 additions and 5 deletions
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15
metrik/tasks/ice.py
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@ -17,17 +17,22 @@ class USDLibor(Task):
)
def parse_london(dt_str):
# Pandas does its best to try and help us out by modifying the
# actual csv content to try and add timezone and date information.
# Which is not in any sense what we want.
# So we have convoluted steps to go and fix that.
# I'm getting inconsistent behavior in how Pandas parses the CSV
# file for dates and times. On Travis, it doesn't look like the
# content is being modified. On my computer, Pandas is spitting
# back a localized time. So, after parsing, if we have a timezone-
# enabled datetime, switch to Europe/London, and if not, add the
# Europe/London info to it
london_tz = pytz.timezone('Europe/London')
# Note that parse() implicitly adds timezone information because
# of how pandas gave us the value
dt = parse(dt_str).replace(year=date.year,
month=date.month,
day=date.day)
return dt.astimezone(london_tz)
try:
return dt.astimezone(london_tz)
except ValueError:
return london_tz.localize(dt)
# Skip 1 row at top for header (header=0),
# and read 7 total rows. For whatever reason,