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Does Python have a ternary conditional operator?
(30 answers)
Closed 4 years ago.
do you know if Python supports some keyword or expression like in C++ to return values based on if con….
I’m analyzing some Python code and I don’t know what
pop = population[:]
means. Is it something like array lists in Java or like a bi-dimensional array?
….
This question already has answers here:
How to get the nth element of a python list or a default if not available
(13 answers)
Closed 4 years ago.
a = [‘123’, ‘2’, 4]
b = a[4] or ‘sss’
print b
I want to get a default value ….
I mostly use lambda functions but sometimes use nested functions that seem to provide the same behavior.
Here are some trivial examples where they functionally do the same thing if either were found within another function:
Lambda function
>>> a = lambda x : 1 + x
>>> a(5)
6
Nested function
>>> def b(x): return 1 + x
>>> b(5)
6
Are there advant….
Can you add new statements (like print, raise, with) to Python’s syntax?
Say, to allow..
mystatement “Something”
Or,
new_if True:
print “example”
Not so much if you should, but rather if it’s possible (short of modifying the python interpreters code)
….
In a python source code I stumbled upon I’ve seen a small b before a string like in:
b”abcdef”
I know about the u prefix signifying a unicode string, and the r prefix for a raw string literal.
What does the b stand for and in which kind of source code is it useful as it seems to be exactly like a plain string without any prefix?
….
This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
Python Ternary Operator
Is there a way to write this C/C++ code in Python?
a = (b == true ? “123” : “456” )
….
Code:
file(‘pinax/media/a.jpg’, ‘wb’)
….
In the case of a single element tuple, the trailing comma is required.
a = (‘foo’,)
What about a tuple with multiple elements? It seems that whether the trailing comma exists or not, they are both valid. Is this correct? Having a trailing comma is easier for editing in my opinion. Is that a bad coding style?
a = (‘foo1’, ‘foo2’)
b = (‘foo1’, ‘foo….
I know it’s a really simple question, but I have no idea how to google it.
how can I do
print ‘%s‘ % (my_url)
So that my_url is used twice? I assume I have to “name” the %s and then use a dict in the params, but I’m not sure of the proper syntax?
just FYI, I’m aware I can just use my_url twice in the params, but that’s not the p….