大约有 40,900 项符合查询结果（耗时：0.0355秒） [XML]
Is passing 'this' in a method call accepted practice in java
...
answered Jul 3 '13 at 7:16
Denys SéguretDenys Séguret
321k6969 gold badges680680 silver badges668668 bronze badges
...
Int division: Why is the result of 1/3 == 0?
...
The two operands (1 and 3) are integers, therefore integer arithmetic (division here) is used. Declaring the result variable as double just causes an implicit conversion to occur after division.
Integer division of course returns the true result of...
Get difference between two lists
...))
Out[5]: ['Four', 'Three']
Beware that
In [5]: set([1, 2]) - set([2, 3])
Out[5]: set([1])
where you might expect/want it to equal set([1, 3]). If you do want set([1, 3]) as your answer, you'll need to use set([1, 2]).symmetric_difference(set([2, 3])).
...
What is the reason for having '//' in Python? [duplicate]
...
In Python 3, they made the / operator do a floating-point division, and added the // operator to do integer division (i.e. quotient without remainder); whereas in Python 2, the / operator was simply integer division, unless one of the ...
Is there a difference between using a dict literal and a dict constructor?
...
answered Jul 7 '11 at 12:43
John La RooyJohn La Rooy
249k4646 gold badges326326 silver badges469469 bronze badges
...
how does multiplication differ for NumPy Matrix vs Array classes?
...find it more trouble than it's worth, though.
For arrays (prior to Python 3.5), use dot instead of matrixmultiply.
E.g.
import numpy as np
x = np.arange(9).reshape((3,3))
y = np.arange(3)
print np.dot(x,y)
Or in newer versions of numpy, simply use x.dot(y)
Personally, I find it much more read...
How to count the frequency of the elements in an unordered list?
...
33 Answers
33
Active
...
How to print a dictionary line by line in Python?
...
13 Answers
13
Active
...
Python 3: UnboundLocalError: local variable referenced before assignment [duplicate]
...
Jakob BowyerJakob Bowyer
28.3k66 gold badges6666 silver badges8787 bronze badges
...
Creating an instance of class
What's the difference between lines 1 , 2 , 3 , 4?
3 Answers
3
...