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Repeat string to certain length

... def repeat_to_length(string_to_expand, length): return (string_to_expand * ((length/len(string_to_expand))+1))[:length] For python3: def repeat_to_length(string_to_expand, length): return (string_to_expand * (int(length/len(s...
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Django ManyToMany filter()

... Just restating what Tomasz said. There are many examples of FOO__in=... style filters in the many-to-many and many-to-one tests. Here is syntax for your specific problem: users_in_1zone = User.objects.filter(zones__id=<id1>) # same thing but using in users_in_1zone = User.object...
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What's the difference between django OneToOneField and ForeignKey?

...) >>> e2 = Engine2.objects.get(name='Wankel') >>> e2.car2_set.all() [<Car2: Mazda>] Model Code from django.db import models class Engine(models.Model): name = models.CharField(max_length=25) def __unicode__(self): return self.name class Car(models.Model)...
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Regex lookahead, lookbehind and atomic groups

...pression.info for more details. Positive lookahead: Syntax: (?=REGEX_1)REGEX_2 Match only if REGEX_1 matches; after matching REGEX_1, the match is discarded and searching for REGEX_2 starts at the same position. example: (?=[a-z0-9]{4}$)[a-z]{1,2}[0-9]{2,3} REGEX_1 is [a-z0-9]{4}$ which...
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Chrome sendrequest error: TypeError: Converting circular structure to JSON

...mit": null, "size": 0, "chunks": [], "writable": true, "readable": false, "_events": { "pipe": [null, null], "error": [null] }, "before": [null], "after": [], "response": { "output": [], "outputEncodings": [], "writable": true, "_last": false, "chunkedEncoding": false, ...
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Cannot resolve the collation conflict between “SQL_Latin1_General_CP1_CI_AS” and “Latin1_General_CI_

... your table(s) has by using this query: SELECT col.name, col.collation_name FROM sys.columns col WHERE object_id = OBJECT_ID('YourTableName') Collations are needed and used when ordering and comparing strings. It's generally a good idea to have a single, unique collation used through...
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How to change the CHARACTER SET (and COLLATION) throughout a database?

... change database collation: ALTER DATABASE <database_name> CHARACTER SET utf8 COLLATE utf8mb4_0900_ai_ci; change table collation: ALTER TABLE <table_name> CONVERT TO CHARACTER SET utf8 COLLATE utf8mb4_0900_ai_ci; change column collation: ALTER TABLE <table_name&g...
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What is the python keyword “with” used for? [duplicate]

...t in an object that supports the context management protocol (that is, has __enter__() and __exit__() methods). Update fixed VB callout per Scott Wisniewski's comment. I was indeed confusing with with using. share ...
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Printing without newline (print 'a',) prints a space, how to remove?

... you to set an end parameter. You can use it in >=2.6 by importing from __future__. I'd avoid this in any serious 2.x code though, as it will be a little confusing for those who have never used 3.x. However, it should give you a taste of some of the goodness 3.x brings. >>> from __futur...
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performSelector may cause a leak because its selector is unknown

... should simply be ignored, and it's easy to work around. Here's how: if (!_controller) { return; } SEL selector = NSSelectorFromString(@"someMethod"); IMP imp = [_controller methodForSelector:selector]; void (*func)(id, SEL) = (void *)imp; func(_controller, selector); Or more tersely (though hard...