4 ms·

This cheat sheet sucks. Some examples: > list1.extend(object1): Extends list1 with object1 creating a whole list instead of append which jams a an object insid

This cheat sheet sucks. Some examples: > list1.extend(object1): Extends list1 with object1 creating a whole list instead of append which jams a an object inside the list. Extend takes an iterable and not an object. Not sure I can even comprehend that sentence. > dictionary1.update(dictionary2): updates dictionary1 with values from identical keys in dictionary2 Identical to what? Update adds all key-value pairs from dictionary2. I guess the text might refer to the fact that update overwrites existing values. > ‘string1’.strip(): Returns one string with whitespace removed. Only at the start and end of the string. > ’string1’.count(object1): Returns the number of times that object1 appears in string1. This method doesn't exist as far as I can tell and I'm not sure how an object "appears" in a string.

TazeTSchnitzel 14y ago
Looks like it exists, and works (at least for strings): >>> 'test'.count('e') 1 >>> 'test'.count('') 5 >>> 'test'.count('tes') 1 >>> 'test'.count('t') 2 >>> 'test'.count('apple') 0 Seems to be the equivalent of `in` on a string but with a count.
- nemetroid 14y ago
  It does exist for strings, but the list contains both `.count('string2')` and `.count(object1)`.
  - TazeTSchnitzel 14y ago
    It also works on lists, I think he got confused.
rmc 14y ago
Aren't all iterables objects? You can turn any object into an iterable by adding through __iter__ method IIRC
- clinth 14y ago
  Yes, but all objects are not iterables. If you list1.extend(object1) as the cheat sheet describes and object1 has no __iter__, it won't work. Likewise, you can iterate strings, so understanding the target of the iterable will be frustrating for list_of_strings.extend('newstring'). This is better described in python's native help documentation: $ python >>> help() >>> list searching for extend via '/extend': | extend(...) | L.extend(iterable) -- extend list by appending elements from the iterable Concise and correct.
mercuryrising 14y ago
> This cheat sheet sucks. Some examples: Make a better one and get it to the front page of HN.
- nemetroid 14y ago
  Whether or not I make one has no bearing on this one's quality.

TazeTSchnitzel 14y ago

Looks like it exists, and works (at least for strings): >>> 'test'.count('e') 1 >>> 'test'.count('') 5 >>> 'test'.count('tes') 1 >>> 'test'.count('t') 2 >>> 'test'.count('apple') 0 Seems to be the equivalent of `in` on a string but with a count.

nemetroid 14y ago
It does exist for strings, but the list contains both `.count('string2')` and `.count(object1)`.
- TazeTSchnitzel 14y ago
  It also works on lists, I think he got confused.

rmc 14y ago

Aren't all iterables objects? You can turn any object into an iterable by adding through __iter__ method IIRC

clinth 14y ago
Yes, but all objects are not iterables. If you list1.extend(object1) as the cheat sheet describes and object1 has no __iter__, it won't work. Likewise, you can iterate strings, so understanding the target of the iterable will be frustrating for list_of_strings.extend('newstring'). This is better described in python's native help documentation: $ python >>> help() >>> list searching for extend via '/extend': | extend(...) | L.extend(iterable) -- extend list by appending elements from the iterable Concise and correct.

mercuryrising 14y ago

> This cheat sheet sucks. Some examples: Make a better one and get it to the front page of HN.

nemetroid 14y ago
Whether or not I make one has no bearing on this one's quality.