On Fri, Aug 23, 2019 at 4:00 AM Windson Yang wrote:
>
> Thank you all. I agreed with Frank that
>
> > It would make sense to use the 'global' keyword if you have a module
> with various functions, several of which refer to 'foo', but only one of
> which changes the value of 'foo'.
>
> I also found
Thank you all. I agreed with Frank that
> It would make sense to use the 'global' keyword if you have a module
with various functions, several of which refer to 'foo', but only one of
which changes the value of 'foo'.
I also found an example in cpython/lib/gettext.py, only 'textdomain
function' c
On 23Aug2019 09:07, Frank Millman wrote:
On 2019-08-23 8:43 AM, Windson Yang wrote:
In class.py
class Example:
def __init__(self):
self.foo = 1
def bar()
return self.foo + 1
Expect the syntax, why using class variable self.foo would be better (or
m
On 23Aug2019 14:43, Windson Yang wrote:
I also want to know what is the difference between "using 'global
variables' in a py module" and "using a variable in class". For example:
In global.py:
foo = 1
def bar():
global foo
return foo + 1
In class.py
class Example:
On 2019-08-23 8:43 AM, Windson Yang wrote:
I also want to know what is the difference between "using 'global
variables' in a py module" and "using a variable in class". For example:
In global.py:
foo = 1
def bar():
global foo
return foo + 1
In class.py
class
I also want to know what is the difference between "using 'global
variables' in a py module" and "using a variable in class". For example:
In global.py:
foo = 1
def bar():
global foo
return foo + 1
In class.py
class Example:
def __init__(self):
s
On Fri, Aug 23, 2019 at 11:24 AM Windson Yang wrote:
>
> Thank you all for the great explanation, I still trying to find some good
> example to use 'global', In CPython, I found an example use 'global' in
> cpython/Lib/zipfile.py
>
> _crctable = None
> def _gen_crc(crc):
> for j in
Thank you all for the great explanation, I still trying to find some good
example to use 'global', In CPython, I found an example use 'global' in
cpython/Lib/zipfile.py
_crctable = None
def _gen_crc(crc):
for j in range(8):
if crc & 1:
crc = (crc >> 1) ^
On 8/22/19 12:00 PM, Windson Yang wrote:
> I can 'feel' that global variables are evil. I also read lots of articles
> proves that (http://wiki.c2.com/?GlobalVariablesAreBad). However, I found
> CPython Lib use quite a lot of `global` keyword. So how should we use
> `global` keyword correctly? IIUC
On Fri, Aug 23, 2019 at 10:18 AM Cameron Simpson wrote:
> As Michael says, "you can always read from a parent scope if the name
> hasn't been used by the local scope". What this means is this:
>
> _MODULE_LEVEL_CACHE = {}
>
> def factors_of(n):
> factors = _MODULE_LEVEL_CACHE.get(n
On 22Aug2019 11:12, Michael Torrie wrote:
On 8/22/19 10:00 AM, Windson Yang wrote:
I can 'feel' that global variables are evil. I also read lots of articles
proves that (http://wiki.c2.com/?GlobalVariablesAreBad). However, I found
CPython Lib use quite a lot of `global` keyword. So how should w
On 8/22/19 10:00 AM, Windson Yang wrote:
> I can 'feel' that global variables are evil. I also read lots of articles
> proves that (http://wiki.c2.com/?GlobalVariablesAreBad). However, I found
> CPython Lib use quite a lot of `global` keyword. So how should we use
> `global` keyword correctly? IIUC
I can 'feel' that global variables are evil. I also read lots of articles
proves that (http://wiki.c2.com/?GlobalVariablesAreBad). However, I found
CPython Lib use quite a lot of `global` keyword. So how should we use
`global` keyword correctly? IIUC, it's fine that we use `global` keyword
inside t
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