大约有 40,000 项符合查询结果（耗时：0.0158秒） [XML]
How can I get list of values from dict?
...ker?
[*L] vs. [].extend(L) vs. list(L)
small_ds = {x: str(x+42) for x in range(10)}
small_df = {x: float(x+42) for x in range(10)}
print('Small Dict(str)')
%timeit [*small_ds.values()]
%timeit [].extend(small_ds.values())
%timeit list(small_ds.values())
print('Small Dict(float)')
%timeit [*small...
How to generate a random integer number from within a range
...cally wrong. Returning rand() % N does not uniformly give a number in the range [0, N) unless N divides the length of the interval into which rand() returns (i.e. is a power of 2). Furthermore, one has no idea whether the moduli of rand() are independent: it's possible that they go 0, 1, 2, ..., w...
Naming returned columns in Pandas aggregate function? [duplicate]
...ata frame
df = pd.DataFrame({'A': [1, 1, 1, 2, 2],
'B': range(5),
'C': range(5)})
# ==== SINGLE COLUMN (SERIES) ====
# Syntax soon to be deprecated
df.groupby('A').B.agg({'foo': 'count'})
# Recommended replacement syntax
df.groupby('A').B.agg(['count']).rename(...
Which is faster in Python: x**.5 or math.sqrt(x)?
...ificantly faster than x**0.5.
import math
N = 1000000
%%timeit
for i in range(N):
z=i**.5
10 loops, best of 3: 156 ms per loop
%%timeit
for i in range(N):
z=math.sqrt(i)
10 loops, best of 3: 91.1 ms per loop
Using Python 3.6.9 (notebook).
...
Conditional formatting based on another cell's value
...
Use the "Custom formula is" option and set it to =B5>0.8*C5.
set the "Range" option to B5.
set the desired color
You can repeat this process to add more colors for the background or text or a color scale.
Even better, make a single rule apply to all rows by using ranges in "Range". Example a...
Maximum single-sell profit
...he buy and sell times to maximize profit.
The minimum value overall in the range.
The maximum value overall in the range.
These last two values can be computed recursively using a straightforward recursion that we can run at the same time as the recursion to compute (1):
The max and min values o...
Print all day-dates between two dates [duplicate]
... 9, 15) # end date
delta = edate - sdate # as timedelta
for i in range(delta.days + 1):
day = sdate + timedelta(days=i)
print(day)
The output:
2008-08-15
2008-08-16
...
2008-09-13
2008-09-14
2008-09-15
Your question asks for dates in-between but I believe you meant including t...
How to reset index in a pandas dataframe? [duplicate]
...
Another solutions are assign RangeIndex or range:
df.index = pd.RangeIndex(len(df.index))
df.index = range(len(df.index))
It is faster:
df = pd.DataFrame({'a':[8,7], 'c':[2,4]}, index=[7,8])
df = pd.concat([df]*10000)
print (df.head())
In [298]: %t...
Regex (grep) for multi-line search needed [duplicate]
...ome simple solution. Thanks ! @Kev The comma is used as a separator in AWK range pattern. See full explanation in section 7.1.3 Specifying Record Ranges with Patterns of AWK user guide
– Olivier
Nov 21 '16 at 11:12
...
Validating IPv4 addresses with regexp
... (25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?(\.|$)){4} , but it produces some strange results:
36 Answers
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