[Tutor] small remark
adil gourinda
rikudou__sennin at live.com
Tue Jan 10 12:56:54 EST 2017
When I was surfing in “Python Library” I made some observations and I want to share them with you in attention to have an answer :
1) I suggest some changes in the following sections :
-------------------------------------------------------------------------------------------------
*date.replace(year=self.year, month=self.month, day=self.day)
… . For example, if "d == date(2002, 12, 31)", then "d.replace(day=26) == date(2002, 12, 26)".
->change to:
*date.replace(year=self.year, month=self.month, day=self.day)
… . For example:
>>> d=date(2002,12,31)
>>> d.replace(day=26)
datetime.date(2002, 12, 26)
-----------------------------------------------------------------------------------------------
*date.weekday()
… . For example, "date(2002, 12, 4).weekday() == 2", a Wednesday. … .
→change to :
*date.weekday()
… . For example:
>>> date(2002, 12, 4).weekday()
2 (a Wednesday)
------------------------------------------------------------------------------
*date.isoweekday()
… . For example, "date(2002, 12, 4).isoweekday() == 3", a Wednesday. … .
→change to:
*date.isoweekday()
… . For example:
>>> date(2002, 12, 4).isoweekday()
3
--------------------------------------------------------------------------------------------------------------
*date.isoformat()
… . For example, "date(2002, 12, 4).isoformat() == '2002-12-04'".
→change to:
*date.isoformat()
… . For example:
>>> date(2002, 12, 4).isoformat()
'2002-12-04'
-------------------------------------------------------------------------------------------------------------------
*date.ctime()
..., for example "date(2002, 12, 4).ctime() == 'Wed Dec 4 00:00:00 2002'". … .
→change to :
*date.ctime()
..., for example:
>>> date(2002, 12, 4).ctime()
'Wed Dec 4 00:00:00 2002'
---------------------------------------------------------------------------------------------------------------
*datetime.ctime()
..., for example "datetime(2002, 12, 4, 20, 30, 40).ctime() == 'Wed Dec 4 20:30:40
2002'". ....
→change to:
*datetime.ctime()
..., for example:
>>> datetime(2002, 12, 4, 20, 30, 40).ctime()
'Wed Dec 4 20:30:40 2002'
Those are examples in script format that the reader can try them which make the documentation more understandable for beginners like me.
2) If we compare some methods between them we will find some methods more generalized than others, So why we continue to use the latter :
* List.insert(i,x) vs List.append(x) vs List.extend(x) :
list.append(x) is restricted in the number of items in comparison with list.extend(x) and it is restricted in the position of items in comparison with list.insert(i,x), So I don’t see the utility of list.append(x) in front of the two others method.
* For log function I suggest this optimization in its presentation :
math.log(x[, base])
With one argument, return the natural logarithm of *x* (to base *e*).
With two arguments, return the logarithm of *x* to the given *base*, calculated as "log(x)/log(base)".
math.log2(x)
Return the base-2 logarithm of *x*. This is usually more accurate than "log(x, 2)".
…
math.log10(x)
Return the base-10 logarithm of *x*. This is usually more accurate than "log(x, 10)".
--------
math.log(x[, base])
*return the logarithm of *x* to the given *base*, calculated as "log(x)/log(base)".
*if base is omitted=> return the natural logarithm of *x* (to base *e*).
*if base=2 => math.log2(x): Return the base-2 logarithm of *x*. This is usually more accurate than "log(x, 2)".
*if base=10 => math.log10(x): Return the base-10 logarithm of *x*. This is usually more accurate than "log(x, 10)".
Thank you for your attention and I wish I was helpful [😊]
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