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How do I validate a date string format in python?
...ncorrect data format, should be YYYY-MM-DD")
>>> validate('2003-12-23')
>>> validate('2003-12-32')
Traceback (most recent call last):
File "<pyshell#20>", line 1, in <module>
validate('2003-12-32')
File "<pyshell#18>", line 5, in validate
raise Valu...
TINYTEXT, TEXT, MEDIUMTEXT, and LONGTEXT maximum storage sizes
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1549
From the documentation (MySQL 8) :
Type | Maximum length
-----------+----------------...
ImportError: No module named pip
OS: Mac OS X 10.7.5
Python Ver: 2.7.5
16 Answers
16
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Traverse a list in reverse order in Python
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1254
Use the built-in reversed() function:
>>> a = ["foo", "bar", "baz"]
>>> fo...
Difference between doseq and for in Clojure
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168
The difference is that for builds a lazy sequence and returns it while doseq is for executing ...
Define variable to use with IN operator (T-SQL)
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14 Answers
14
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How do I tell Matplotlib to create a second (new) plot, then later plot on the old one?
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155
If you find yourself doing things like this regularly it may be worth investigating the object...
Making heatmap from pandas DataFrame
... columns=columns)
plt.pcolor(df)
plt.yticks(np.arange(0.5, len(df.index), 1), df.index)
plt.xticks(np.arange(0.5, len(df.columns), 1), df.columns)
plt.show()
This gives:
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What's NSLocalizedString equivalent in Swift?
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15 Answers
15
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Using a dictionary to count the items in a list [duplicate]
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in 2.7 and 3.1 there is special Counter dict for this purpose.
>>> from collections import Counter
>>> Counter(['apple','red','apple','red','red','pear'])
Counter({'red': 3, 'apple': 2, 'pear': 1})
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