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How do I profile memory usage in Python?
....6 KiB
return _heapq.nlargest(n, self.items(), key=_itemgetter(1))
#3: python3.6/heapq.py:569: 0.5 KiB
result = [(key(elem), i, elem) for i, elem in zip(range(0, -n, -1), it)]
10 other: 2.2 KiB
Total allocated size: 4.0 KiB
Now here's a version inspired by another answer that starts a seco...
Short description of the scoping rules?
...
There was no thorough answer concerning Python3 time, so I made an answer here. Most of what is described here is detailed in the 4.2.2 Resolution of names of the Python 3 documentation.
As provided in other answers, there are 4 basic scopes, the LEGB, for Local, ...
Representing graphs (data structure) in Python
...all references to node """
for n, cxns in self._graph.items(): # python3: items(); python2: iteritems()
try:
cxns.remove(node)
except KeyError:
pass
try:
del self._graph[node]
except KeyError:
p...
Named colors in matplotlib
...name, hex in matplotlib.colors.cnames.iteritems():
print(name, hex)
# python3:
import matplotlib
for name, hex in matplotlib.colors.cnames.items():
print(name, hex)
This is the complete dictionary:
cnames = {
'aliceblue': '#F0F8FF',
'antiquewhite': '#FAEBD7',
'aqua': ...
What would a “frozen dict” be?
...if config is None:
config = default_config = {'a': 1}
...
In python3 you have the option of this:
from types import MappingProxyType
default_config = {'a': 1}
DEFAULTS = MappingProxyType(default_config)
def foo(config=DEFAULTS):
...
Now the default config can be updated dynami...
Generate a heatmap in MatPlotLib using a scatter data set
...
Too bad it doesn't work with python3. It installs, but then crashes when you try to use it...
– Fábio Dias
May 15 '18 at 18:46
1
...
使用Activity启动器组件 · App Inventor 2 中文网
...aia 文件），你可以按如下方式找到这些名称：
将源代码下载到你的计算机。
使用文件资源管理器或解压缩实用程序，找到名为 youngandroidproject/project.properties 的文件。
第一行以main=开头。 之后的所有内容都是包名和类名。
例...
List of ANSI color escape sequences
...3[0m");
In C++ you'd use
std::cout<<"\033[31;1;4mHello\033[0m";
In Python3 you'd use
print("\033[31;1;4mHello\033[0m")
and in Bash you'd use
echo -e "\033[31;1;4mHello\033[0m"
where the first part makes the text red (31), bold (1), underlined (4) and the last part clears all this (0).
As d...
Python read-only property
...;module>()
----> 1 f.a = 'boom'
/home/oznt/.virtualenvs/tracker/lib/python3.5/site-packages/rop.py in __setattr__(self, name, value)
116 pass
117 else:
--> 118 raise AttributeError("Can't touch {}".format(name))
119
1...
If Python is interpreted, what are .pyc files?
...ython caches the byte code in a foo.pyc file right next to the source.
In python3, Python's import machinery is extended to write and search for byte code cache files in a single directory inside every Python package directory. This directory will be called __pycache__ .
Here is a flow chart descr...