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Python pandas: fill a dataframe row by row
... pandas as pd
df = pd.DataFrame(columns=('col1', 'col2', 'col3'))
for i in range(5):
df.loc[i] = ['<some value for first>','<some value for second>','<some value for third>']`
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Getting MAC Address
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Or ':'.join(("%012X" % mac)[i:i+2] for i in range(0, 12, 2)) for an uppercase MAC with each byte separated by a colon.
– tomlogic
Nov 10 '14 at 17:21
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Long vs Integer, long vs int, what to use and when?
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By default use an int, when holding numbers.
If the range of int is too small, use a long
If the range of long is too small, use BigInteger
If you need to handle your numbers as object (for example when putting them into a Collection, handling null, ...) use Integer/Long inste...
Getting the last element of a list
... when you want an element only postpones the inevitable "list index out of range" - and that's what should happen when attempting to get an element from an empty list. For Strings astr[-1:] could be a valid approach since it returns the same type as astr[-1], but I don't think the ':' helps to deal ...
Filter dataframe rows if value in column is in a set list of values [duplicate]
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you can also use ranges by using:
b = df[(df['a'] > 1) & (df['a'] < 5)]
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fo...
Is there a decorator to simply cache function return values?
...turn n
return fib(n-1) + fib(n-2)
>>> print([fib(n) for n in range(16)])
[0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610]
>>> print(fib.cache_info())
CacheInfo(hits=28, misses=16, maxsize=None, currsize=16)
If you are stuck with Python 2.x, here's a list of o...
Useful code which uses reduce()? [closed]
..."".join(map(str, digit_list)))', setup = 'digit_list = list(d%10 for d in xrange(1,1000))', number=1000) takes ~0.09 seconds while timeit.repeat('reduce(lambda a,d: 10*a+d, digit_list)', setup = 'digit_list = list(d%10 for d in xrange(1,1000))', number=1000) takes 0.36 seconds (about 4 times slower)...
Why does Python print unicode characters when the default encoding is ASCII?
...ascii' codec can't encode character u'\xe9'
in position 0: ordinal not in range(128)
Lets exit Python and discard the bash shell.
We'll now observe what happens after Python outputs strings. For this we'll first start a bash shell within a graphic terminal (I use Gnome Terminal) and we'll set...
How to convert std::string to lower case?
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Using range-based for loop of C++11 a simpler code would be :
#include <iostream> // std::cout
#include <string> // std::string
#include <locale> // std::locale, std::tolower
int main ()
{
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PHPExcel auto size column width
...ng.
But you also need to identify the columns to set dimensions:
foreach(range('B','G') as $columnID) {
$objPHPExcel->getActiveSheet()->getColumnDimension($columnID)
->setAutoSize(true);
}
$objPHPExcel->getActiveSheet()->getColumnDimension() expects a column ID.
$objP...