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How to group dataframe rows into list in pandas groupby?
...y level:
import numpy as np
df = pd.DataFrame({'a': np.random.randint(0, 60, 600), 'b': [1, 2, 5, 5, 4, 6]*100})
def f(df):
keys, values = df.sort_values('a').values.T
ukeys, index = np.unique(keys, True)
arrays = np.split(values, index[1:])
df2 = pd.DataFrame(...
What is the fastest way to check if a class has a function defined?
...loop
>>> %timeit hasattr(obj, "invert_op")
The slowest run took 4.60 times longer than the fastest. This could mean that an intermediate result is being cached.
1000000 loops, best of 3: 674 ns per loop
>>> %timeit "invert_op" in obj.__dict__
The slowest run took 12.19 times longer...
CSS scrollbar style cross browser [duplicate]
... this however does not work in IE
– user2886091
Mar 13 '14 at 10:11
1
See also: css-tri...
Java 8 Distinct by property
...
60
Another solution, using Set. May not be the ideal solution, but it works
Set<String> set...
How to send a simple string between two programs using pipes?
...
Shadow Wizard is Ear For You
60.7k2020 gold badges126126 silver badges190190 bronze badges
answered Aug 14 '11 at 9:56
mloukmlouk
...
How can one print a size_t variable portably using the printf family?
...
60
For C89, use %lu and cast the value to unsigned long:
size_t foo;
...
printf("foo = %lu\n", (u...
@RequestParam vs @PathVariable
...
Oskarzito
46022 silver badges1212 bronze badges
answered Dec 5 '12 at 7:47
RalphRalph
109...
How to install Boost on Ubuntu
...time via apt-get you can get this from boost.org/users/history/version_1_60_0.html and then expand it. Follow the excellent instructions above, remembering that LD Library Path is not the same as $PATH
– Andrew Killen
May 2 '17 at 10:51
...
What is :: (double colon) in Python when subscripting sequences?
... 46, 47, 48, 49],
[50, 51, 52, 53, 54, 55, 56, 57, 58, 59],
[60, 61, 62, 63, 64, 65, 66, 67, 68, 69],
[70, 71, 72, 73, 74, 75, 76, 77, 78, 79],
[80, 81, 82, 83, 84, 85, 86, 87, 88, 89],
[90, 91, 92, 93, 94, 95, 96, 97, 98, 99]])
Say for some reason, your boss want...
What's the syntax for mod in java
...
60
Careful with the terms mod and modular because n (mod m) IS ALWAYS >= 0 but not n % m. n % m is in the range > -m and < m. Althoug...