v0.15.0 Changes❗

In the upcoming version 0.15.0 of arrow, we will be making a lot of changes to the behavior of arrow.get() to address a number of reported parsing bugs. We have outlined the changes below:

Fixes

• Most instances of arrow.get() returning an incorrect arrow object from a partial parsing match have been eliminated.

For example,

>>> arrow.get("garbage2017everywhere")
<Arrow [2017-01-01T00:00:00+00:00]>

>>> arrow.get('Jun-2019', ['MMM-YY', 'MMM-YYYY'])
<Arrow [2020-06-01T00:00:00+00:00]>

These will raise a ParserError in 0.15.0.

• When a meridian token (a|A) is passed and no meridians are available for the specified locale (e.g. unsupported or untranslated), a ParserError is raised.
• Timestamp strings are no longer supported in the arrow.get() method without a format string: arrow.get("1565358758"). This change was made to support the ISO 8601 basic format and to address bugs such as https://github.com/crsmithdev/arrow/issues/447.

The following will still work as expected:

arrow.get("1565358758", "X")
arrow.get("1565358758.123413", "X")
arrow.get(1565358758)
arrow.get(1565358758.123413)

• The timestamp token (X) will now matches float timestamps: arrow.get("1565358758.123415", "X").
• The timestamp token (X) will now only match on strings that strictly contain integers and floats, preventing incorrect matches.

New Features

• ISO-8601 basic format style is now supported (e.g. YYYYMMDDThhmmssZ)
• Added support for DDD and DDDD ordinal date tokens (e.g. "1998-045")

Issues addressed

• https://github.com/crsmithdev/arrow/issues/560
• https://github.com/crsmithdev/arrow/issues/538
• https://github.com/crsmithdev/arrow/issues/434
• https://github.com/crsmithdev/arrow/issues/519
• https://github.com/crsmithdev/arrow/issues/91
• https://github.com/crsmithdev/arrow/issues/447
• https://github.com/crsmithdev/arrow/issues/196
• https://github.com/crsmithdev/arrow/issues/456
• https://github.com/crsmithdev/arrow/issues/396

Development progress

You can view the progress of these changes here: https://github.com/crsmithdev/arrow/tree/Version-0.15.0.

Disable Warnings

To get rid of the ArrowParseWarning messages in 0.14.3 onwards, do the following:

import warnings
from arrow.factory import ArrowParseWarning

warnings.simplefilter("ignore", ArrowParseWarning)

[kornpow]

I still get warnings when I pass a parser string to .get() Also here is a full example for disabling warnings if anyone needs: Using arrow 0.14.3

import arrow

import warnings

from arrow.factory import ArrowParseWarning

astring = "2019-07-29T13:58:44.460381Z"

# Show warning still?

arrow.get(astring,"YYYY-MM-DD[T]HH:mm:ss.S[Z]")

# Filter out the warnings

warnings.simplefilter("ignore", ArrowParseWarning)

# No warnings anymore

arrow.get(astring,"YYYY-MM-DD[T]HH:mm:ss.S[Z]")

[joinemm]

The flexible .get() was in my opinion one of the best features of arrow, as it allowed for parsing of unknown or user generated time strings without any extra logic. I wonder if it’s possible you could keep the old functionality of .get() in a new separate function? Maybe like .fuzzy_get() or something.