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Getting distance between two points based on latitude/longitude
...4, and is implemented in geopy. For example,
import geopy.distance
coords_1 = (52.2296756, 21.0122287)
coords_2 = (52.406374, 16.9251681)
print geopy.distance.vincenty(coords_1, coords_2).km
will print the distance of 279.352901604 kilometers using the default ellipsoid WGS-84. (You can also ch...
What exactly are iterator, iterable, and iteration?
...and iterator have specific meanings.
An iterable is an object that has an __iter__ method which returns an iterator, or which defines a __getitem__ method that can take sequential indexes starting from zero (and raises an IndexError when the indexes are no longer valid). So an iterable is an object...
How to run functions in parallel?
...starting'
for i in xrange(10000000): pass
print 'func2: finishing'
if __name__ == '__main__':
p1 = Process(target=func1)
p1.start()
p2 = Process(target=func2)
p2.start()
p1.join()
p2.join()
The mechanics of starting/joining child processes can easily be encapsulated into a functio...
Stripping everything but alphanumeric chars from a string in Python
...ng.printable (part of the built-in string module). The use of compiled '[\W_]+' and pattern.sub('', str) was found to be fastest.
$ python -m timeit -s \
"import string" \
"''.join(ch for ch in string.printable if ch.isalnum())"
10000 loops, best of 3: 57.6 usec per loop
$ python -m tim...
How to locate the git config file in Mac [duplicate]
...ou can simply open a terminal and execute git config, which will write the appropriate changes to this file. You shouldn't need to manually tweak .gitconfig, unless you particularly want to.
share
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How can I use PowerShell with the Visual Studio Command Prompt?
...t Visual Studio 10.0\VC'
cmd /c "vcvarsall.bat&set" |
foreach {
if ($_ -match "=") {
$v = $_.split("="); set-item -force -path "ENV:\$($v[0])" -value "$($v[1])"
}
}
popd
write-host "`nVisual Studio 2010 Command Prompt variables set." -ForegroundColor Yellow
This has worked well for ye...
How to remove from a map while iterating it?
...begin(); it != m.cend() /* not hoisted */; /* no increment */)
{
if (must_delete)
{
m.erase(it++); // or "it = m.erase(it)" since C++11
}
else
{
++it;
}
}
Note that we really want an ordinary for loop here, since we are modifying the container itself. The range-based loop sh...
How to list all functions in a Python module?
...n example with inspect:
from inspect import getmembers, isfunction
from my_project import my_module
functions_list = [o for o in getmembers(my_module) if isfunction(o[1])]
getmembers returns a list of (object_name, object_type) tuples.
You can replace isfunction with any of the other isXXX func...
What are some good Python ORM solutions? [closed]
...oreignKeyField(Blog)
title = CharField()
body = TextField()
pub_date = DateTimeField(default=datetime.datetime.now)
# query it like django
Entry.filter(blog__name='Some great blog')
# or programmatically for finer-grained control
Entry.select().join(Blog).where(Blog.name == 'Some aweso...
Access an arbitrary element in a dictionary in Python
...
this looks better: dict.values().__iter__().__next__() :)
– Vitaly Zdanevich
Mar 3 '17 at 14:26
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