大约有 40,000 项符合查询结果(耗时:0.0590秒) [XML]
How to measure time taken between lines of code in python?
...
If you want to measure CPU time, can use time.process_time() for Python 3.3 and above:
import time
start = time.process_time()
# your code here
print(time.process_time() - start)
First call turns the timer on, and second call tells you how many seconds have elapsed.
The...
get list from pandas dataframe column
...rame columns are Pandas Series when you pull them out, which you can then call x.tolist() on to turn them into a Python list. Alternatively you cast it with list(x).
import pandas as pd
data_dict = {'one': pd.Series([1, 2, 3], index=['a', 'b', 'c']),
'two': pd.Series([1, 2, 3, 4], inde...
What is the Java string pool and how is “s” different from new String(“s”)? [duplicate]
...terned. The
distinct values are stored in a string
intern pool.
Basically, a string intern pool allows a runtime to save memory by preserving immutable strings in a pool so that areas of the application can reuse instances of common strings instead of creating multiple instances of it.
As an ...
How do I create a variable number of variables?
... answered Sep 3 '09 at 12:41
c_harmc_harm
add a comment
...
android get real path by Uri.getPath()
I'm trying to get image from gallery.
7 Answers
7
...
How to concatenate strings in django templates?
...
I was totally confused by this answer as it uses the include tag instead of the extend tag, but apparently it just works. Though I would recommend Ahsan's own answer as it also workes and is (in my opinion) semantically more correct a...
Convert string to binary in python
...encoding.
In Python 3, then, you can do something like this:
a = "test"
a_bytes = bytes(a, "ascii")
print(' '.join(["{0:b}".format(x) for x in a_bytes]))
The differences between UTF-8 and ascii encoding won't be obvious for simple alphanumeric strings, but will become important if you're process...
Avoid duplicates in INSERT INTO SELECT query in SQL Server
...
Using NOT EXISTS:
INSERT INTO TABLE_2
(id, name)
SELECT t1.id,
t1.name
FROM TABLE_1 t1
WHERE NOT EXISTS(SELECT id
FROM TABLE_2 t2
WHERE t2.id = t1.id)
Using NOT IN:
INSERT INTO TABLE_2
(id, name)
SELECT t...
Suppressing “warning CS4014: Because this call is not awaited, execution of the current method conti
This is not a duplicate of "How to safely call an async method in C# without await" .
8 Answers
...
Using an image caption in Markdown Jekyll
...ere! I am not quite sure where and how to put the CSS part...it would be really great if anyone could help.
– ChriiSchee
Apr 10 '19 at 13:50
2
...
