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python list by value not by reference [duplicate]
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220
As answered in the official Python FAQ:
b = a[:]
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Is there a list of Pytz Timezones?
...pytz.all_timezones:
In [40]: import pytz
In [41]: pytz.all_timezones
Out[42]:
['Africa/Abidjan',
'Africa/Accra',
'Africa/Addis_Ababa',
...]
There is also pytz.common_timezones:
In [45]: len(pytz.common_timezones)
Out[45]: 403
In [46]: len(pytz.all_timezones)
Out[46]: 563
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Python: changing value in a tuple
...t you need to ask, why you want to do this?
But it's possible via:
t = ('275', '54000', '0.0', '5000.0', '0.0')
lst = list(t)
lst[0] = '300'
t = tuple(lst)
But if you're going to need to change things, you probably are better off keeping it as a list
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Reading an Excel file in python using pandas
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229
Close: first you call ExcelFile, but then you call the .parse method and pass it the sheet nam...
How to click first link in list of items after upgrading to Capybara 2.0?
...al .item's so it raises an exception. I consider this behavior of Capybara 2 very good.
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How can I use map and receive an index as well in Scala?
...ls.zipWithIndex.foreach{ case (e, i) => println(i+" "+e) }
0 Mary
1 had
2 a
3 little
4 lamb
From: http://www.artima.com/forums/flat.jsp?forum=283&thread=243570
You also have variations like:
for((e,i) <- List("Mary", "had", "a", "little", "lamb").zipWithIndex) println(i+" "+e)
or:
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Count number of records returned by group by
... COUNT(*) OVER () AS TotalRecords
from temptable
group by column_1, column_2, column_3, column_4
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Is it better to call ToList() or ToArray() in LINQ queries?
...er modified after being created and has a high chance of landing in the Gen2 heap then you may be better off taking the extra allocation of ToArray up front.
In general though I find this to be the rarer case. It's much more common to see a lot of ToArray calls which are immediately passed to ot...
How can I see the entire HTTP request that's being sent by my Python application?
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+50
A simple...
Some built-in to pad a list in python
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oyvind
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answered Aug 9 '10 at 9:43
John La RooyJohn La ...