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How to format a floating number to fixed width in Python
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For Pythons prior to 2.7: ("%0.4f" % x).rjust(10)
– Steven Rumbalski
Jan 16 '12 at 21:26
23
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Finding sum of elements in Swift array
... +) }
}
let numbers = [1,2,3]
numbers.sum() // 6
let doubles = [1.5, 2.7, 3.0]
doubles.sum() // 7.2
To sum a property of a custom object we can extend Sequence to take a keypath with a generic value that conforms to AdditiveArithmetic as parameter:
extension Sequence {
func sum<T: ...
ImportError: No module named matplotlib.pyplot
...uestion states: The environment is: Mac OS X 10.8.4 64bit built-in python 2.7
– Lanting
Aug 11 '17 at 8:14
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How to convert a scala.List to a java.util.List?
... first have to convert the Scala List into a mutable collection.
On Scala 2.7:
import scala.collection.jcl.Conversions.unconvertList
import scala.collection.jcl.ArrayList
unconvertList(new ArrayList ++ List(1,2,3))
From Scala 2.8 onwards:
import scala.collection.JavaConversions._
import scala.c...
ImportError: No module named site on Windows
...ime. I downloaded the following installer from the Python website:
Python 2.7.1 Windows Installer (Windows binary -- does not include source) . I then ran the installer, selected 'All Users' and all was fine. I installed Python into the default location:
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How to filter a dictionary according to an arbitrary condition function?
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Nowadays, in Python 2.7 and up, you can use a dict comprehension:
{k: v for k, v in points.iteritems() if v[0] < 5 and v[1] < 5}
And in Python 3:
{k: v for k, v in points.items() if v[0] < 5 and v[1] < 5}
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How to call Base Class's __init__ method from the child class? [duplicate]
...the answer you're looking for? Browse other questions tagged python python-2.7 inheritance constructor or ask your own question.
Installing SciPy and NumPy using pip
... using a python virtual environment for Python 3.4 (also worked for Python 2.7), and with the following in my setup.py (in the setup() method)
setup_requires=[
'numpy',
],
install_requires=[
'numpy',
'scipy',
],
I found I had to run the following to get pip install -e . to work:
pip ...
How can I display an image from a file in Jupyter Notebook?
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This will import and display a .jpg image in Jupyter (tested with Python 2.7 in Anaconda environment)
from IPython.display import display
from PIL import Image
path="/path/to/image.jpg"
display(Image.open(path))
You may need to install PIL
in Anaconda this is done by typing
conda install pi...
ImportError: No module named MySQLdb
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this didn't work with python2.7.* for me. use of pip install MySQL-python worked.
– Rahul Goyal
Nov 29 '18 at 7:43
1
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