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How can I open the interactive matplotlib window in IPython notebook?
...import seaborn as sns
ts = pd.Series(np.random.randn(1000), index=pd.date_range('1/1/2000', periods=1000))
ts = ts.cumsum()
df = pd.DataFrame(np.random.randn(1000, 4), index=ts.index,
columns=['A', 'B', 'C', 'D'])
df = df.cumsum()
df.plot(); plt.legend(loc='best')
into a co...
How to round to 2 decimals with Python?
...an to 0.53, so rounding to 0.54 makes sense.
– ShadowRanger
Nov 19 '19 at 18:20
"{:0.2f}".format(1.755) -> 1.75 "{:...
Pythonic way to find maximum value and its index in a list?
...import random; import operator;"
"l = [random.random() for _ in xrange(100)]")
print "Explicit: %.2f usec/pass" % (1000000 * t.timeit(number=100000)/100000)
t = Timer("implicit(l)", "from __main__ import explicit, implicit; "
"import random; import operator;"
"...
How to call a JavaScript function from PHP?
...i want it. can you please suggest somthing
– Zeeshan Rang
Jun 25 '09 at 20:09
10
This guy just ma...
Evenly distributing n points on a sphere
...ing Python):
> cat ll.py
from math import asin
nx = 4; ny = 5
for x in range(nx):
lon = 360 * ((x+0.5) / nx)
for y in range(ny):
midpt = (y+0.5) / ny
lat = 180 * a...
How do I delete multiple rows in Entity Framework (without foreach)
...
EntityFramework 6 has made this a bit easier with .RemoveRange().
Example:
db.People.RemoveRange(db.People.Where(x => x.State == "CA"));
db.SaveChanges();
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What are the differences between a clustered and a non-clustered index?
...ad because you avoid an index read AND THEN the table read. It's faster to range scan (if that's meaningful) because the data is stored in order. i.e. the clustering factor is perfect.
– Stephanie Page
Apr 27 '12 at 2:52
...
Get a filtered list of files in a directory
.../*/*.txt")
A single character
glob.glob("/home/ach/file?.txt")
Number Ranges
glob.glob("/home/ach/*[0-9]*")
Alphabet Ranges
glob.glob("/home/ach/[a-c]*")
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...
Python dictionary: Get list of values for list of keys
...d
l = nprnd.randint(1000, size=10000)
m = dict([(_, nprnd.rand()) for _ in range(1000)])
from operator import itemgetter
import operator
f = operator.itemgetter(*l)
%timeit f(m)
%timeit list(itemgetter(*l)(m))
%timeit [m[_] for _ in l] # list comprehension
%timeit map(m.__getitem__, l)
%timeit list...
Is there a difference between “==” and “is”?
...s out the reference implementation of Python caches integer objects in the range -5..256 as singleton instances for performance reasons. Here's an example demonstrating this:
>>> for i in range(250, 260): a = i; print "%i: %s" % (i, a is int(str(i)));
...
250: True
251: True
252: True
253...