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How to extract a floating number from a string [duplicate]
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If your float is always expressed in decimal notation something like
>>> import re
>>> re.findall("\d+\.\d+", "Current Level: 13.4 db.")
['13.4']
may suffice.
A more robust version would be:
>>> re.findall(r"[-+]?\d*\.\d+|\d+", "Current Level: -13.2 db or 14.2 or ...
CodeIgniter activerecord, retrieve last insert id?
...hame on me...
I looked at the user guide and the first function is $this->db->insert_id();
This also works with activerecord inserts...
EDIT: I updated the link
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Don't understand why UnboundLocalError occurs (closure) [duplicate]
...s.count().
So why don't you try it out, and see if it suits your case:
>>> from itertools import count
>>> counter = count(0)
>>> counter
count(0)
>>> next(counter)
0
>>> counter
count(1)
>>> next(counter)
1
>>> counter
count(2)
...
Check if a string contains a number
...
You can use any function, with the str.isdigit function, like this
>>> def hasNumbers(inputString):
... return any(char.isdigit() for char in inputString)
...
>>> hasNumbers("I own 1 dog")
True
>>> hasNumbers("I own no dog")
False
Alternatively you can use a ...
Where is the C auto keyword used?
...tatic. It defines the storage class of a variable. However, since the default for local variables is auto, you don't normally need to manually specify it.
This page lists different storage classes in C.
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How can I create a UIColor from a hex string?
...romRGB(rgbValue) [UIColor colorWithRed:((float)((rgbValue & 0xFF0000) >> 16))/255.0 green:((float)((rgbValue & 0xFF00) >> 8))/255.0 blue:((float)(rgbValue & 0xFF))/255.0 alpha:1.0]
uicolor macro with hex values
Also formatted version of this code:
#define UIColorFromRGB(r...
How to calculate moving average using NumPy?
...dtype=float)
ret[n:] = ret[n:] - ret[:-n]
return ret[n - 1:] / n
>>> a = np.arange(20)
>>> moving_average(a)
array([ 1., 2., 3., 4., 5., 6., 7., 8., 9., 10., 11.,
12., 13., 14., 15., 16., 17., 18.])
>>> moving_average(a, n=4)
array...
Split string using a newline delimiter with Python
...
str.splitlines method should give you exactly that.
>>> data = """a,b,c
... d,e,f
... g,h,i
... j,k,l"""
>>> data.splitlines()
['a,b,c', 'd,e,f', 'g,h,i', 'j,k,l']
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Remove an item from a dictionary when its key is unknown
... if value is not value_to_remove}
But this may not do what you want:
>>> some_dict = {1: "Hello", 2: "Goodbye", 3: "You say yes", 4: "I say no"}
>>> value_to_remove = "You say yes"
>>> some_dict = {key: value for key, value in some_dict.items() if value is not value_t...
How to write log base(2) in c/c++
...d for this (taken from Java's Integer.highestOneBit(int) method): i |= (i >> 1); i |= (i >> 2); i |= (i >> 4); i |= (i >> 8); i |= (i >> 16); return i - (i >>> 1);
– Joey
Jun 17 '10 at 22:21
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