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Commitd941d33

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Merge pull request#18676 from meeseeksmachine/auto-backport-of-pr-18670-on-v3.3.x
Backport PR#18670 on branch v3.3.x (MNT: make certifi actually optional)
2 parents58e9740 +64f1e53 commitd941d33

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2 files changed

+17
-4
lines changed

2 files changed

+17
-4
lines changed

‎lib/matplotlib/__init__.py

Lines changed: 11 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -762,7 +762,11 @@ def is_url(filename):
762762

763763
@functools.lru_cache()
764764
def_get_ssl_context():
765-
importcertifi
765+
try:
766+
importcertifi
767+
exceptImportError:
768+
_log.debug("Could not import certifi.")
769+
returnNone
766770
importssl
767771
returnssl.create_default_context(cafile=certifi.where())
768772

@@ -771,7 +775,12 @@ def _get_ssl_context():
771775
def_open_file_or_url(fname):
772776
ifnotisinstance(fname,Path)andis_url(fname):
773777
importurllib.request
774-
withurllib.request.urlopen(fname,context=_get_ssl_context())asf:
778+
ssl_ctx=_get_ssl_context()
779+
ifssl_ctxisNone:
780+
_log.debug(
781+
"Could not get certifi ssl context, https may not work."
782+
)
783+
withurllib.request.urlopen(fname,context=ssl_ctx)asf:
775784
yield (line.decode('utf-8')forlineinf)
776785
else:
777786
fname=os.path.expanduser(fname)

‎lib/matplotlib/image.py

Lines changed: 6 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -1481,8 +1481,12 @@ def imread(fname, format=None):
14811481
iflen(parsed.scheme)>1:# Pillow doesn't handle URLs directly.
14821482
# hide imports to speed initial import on systems with slow linkers
14831483
fromurllibimportrequest
1484-
withrequest.urlopen(fname,
1485-
context=mpl._get_ssl_context())asresponse:
1484+
ssl_ctx=mpl._get_ssl_context()
1485+
ifssl_ctxisNone:
1486+
_log.debug(
1487+
"Could not get certifi ssl context, https may not work."
1488+
)
1489+
withrequest.urlopen(fname,context=ssl_ctx)asresponse:
14861490
importio
14871491
try:
14881492
response.seek(0)

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