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Alternate FizzBuzz Questions [closed]
...) seems a bit more complicated compared to the rest. I'm working it out in Python 3.x and it's a whole different game. Probably just something I'm unaware of.
– DonutSteve
Aug 12 '19 at 10:27
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How do you rotate a two dimensional array?
...tipping” the matrix onto its right side. We want to write a function, in Python, that takes a matrix and rotates in once to the right. The function signature will be:
def rotate(matrix):
# Algorithm goes here.
The matrix will be defined using a two-dimensional array:
matrix = [
[0,1],
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How do I tell matplotlib that I am done with a plot?
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@JouniK.Seppänen Just to add to your comment, Python will by default warn you if you open many figures: "RuntimeWarning: More than 20 figures have been opened.".
– rph
Sep 14 '18 at 5:26
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How do I pipe a subprocess call to a text file?
...utput = p2.communicate()[0]
There's plenty of lovely, useful info on the python manual page.
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Calculate distance between two latitude-longitude points? (Haversine formula)
...h my jsPerf and see the results here.
Recently I needed to do the same in python, so here is a python implementation:
from math import cos, asin, sqrt, pi
def distance(lat1, lon1, lat2, lon2):
p = pi/180
a = 0.5 - cos((lat2-lat1)*p)/2 + cos(lat1*p) * cos(lat2*p) * (1-cos((lon2-lon1)*p))/2...
How do you sort a list in Jinja2?
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Ok, thanks. I did end up sorting in Python before sending to template: <code>movie_list = sorted( movie_list, key = lambda movie:movie.rating, reverse = True )</code> Too bad, it might be nice to let the template decide on the sort order! ( could ...
Selenium wait until document is ready
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Here's my attempt at a completely generic solution, in Python:
First, a generic "wait" function (use a WebDriverWait if you like, I find them ugly):
def wait_for(condition_function):
start_time = time.time()
while time.time() < start_time + 3:
if condition_fu...
Expression Versus Statement
...ction can iclude unless the language only allows for limited lambdas, like Python's single-expression lambdas.
In an expression-based language, all you need is a single expression for a function since all control structures return a value (a lot of them return NIL). There's no need for a return st...
How to select rows from a DataFrame based on column values?
...>= A) & (df['column_name'] <= B)]
Note the parentheses. Due to Python's operator precedence rules, & binds more tightly than <= and >=. Thus, the parentheses in the last example are necessary. Without the parentheses
df['column_name'] >= A & df['column_name'] <= B
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One-line list comprehension: if-else variants
It's more about python list comprehension syntax. I've got a list comprehension that produces list of odd numbers of a given range:
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