大约有 23,000 项符合查询结果（耗时：0.0309秒） [XML]
Python debugging tips [closed]
... will function as a breakpoint.
>>> import pdb
>>> a="a string"
>>> pdb.set_trace()
--Return--
> <stdin>(1)<module>()->None
(Pdb) p a
'a string'
(Pdb)
To continue execution use c (or cont or continue).
It is possible to execute arbitrary Python expres...
MySQL IF NOT NULL, then display 1, else display 0
...eturns 0. Thus, you have to remember to explicitly check for NULL or empty string:
select if(name is null or name = '', 0, 1)
PS Eugen's example up above is correct, but I wanted to clarify this nuance as it caught me by surprise.
...
Numpy: find first index of value fast
... a benchmark for several methods:
argwhere
nonzero as in the question
.tostring() as in @Rob Reilink's answer
python loop
Fortran loop
The Python and Fortran code are available. I skipped the unpromising ones like converting to a list.
The results on log scale. X-axis is the position of the nee...
Python: Find in list
... if item equals one of the elements inside myList. Maybe you try to find a string that does not exactly match one of the items or maybe you are using a float value which suffers from inaccuracy.
As for your second question: There's actually several possible ways if "finding" things in lists.
Check...
Download large file in python with requests
...1.5gb if you drop it). f.write(b'') (if iter_content() may return an empty string) should be harmless and therefore if chunk could be dropped too.
– jfs
Sep 28 '15 at 1:40
11
...
What is a magic number, and why is it bad? [closed]
...le, if you have (in Java):
public class Foo {
public void setPassword(String password) {
// don't do this
if (password.length() > 7) {
throw new InvalidArgumentException("password");
}
}
}
This should be refactored to:
public class Foo {
pu...
“std::endl” vs “\n”
...cribed in other answers. Anyway, it's redundant when you can merge the two string literals into one.
– iBug
Apr 19 '18 at 6:44
...
How to get all possible combinations of a list’s elements?
...nd this answer: there are 2^N combinations -- same as the number of binary strings of length N. For each binary string, you pick all elements corresponding to a "1".
items=abc * mask=###
|
V
000 ->
001 -> c
010 -> b
011 -> bc
100 -> a
101 -> a c
110 -> ab
111 -> abc
...
What is the maximum length of data I can put in a BLOB column in MySQL?
...B)
a LONGBLOB for 4294967295 bytes (4 GB).
See Storage Requirements for String Types for more info.
share
|
improve this answer
|
follow
|
...
How can I read a function's signature including default argument values?
...value)
def get_method_sig(method):
""" Given a function, it returns a string that pretty much looks how the
function signature would be written in python.
:param method: a python method
:return: A string similar describing the pythong method signature.
eg: "my_method(first_argA...