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Commite860da8

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fixed roman_range (descending generation) + better docs
1 parent947ceb1 commite860da8

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7 files changed

+169
-50
lines changed

7 files changed

+169
-50
lines changed

‎README.md‎

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@@ -331,3 +331,12 @@ secure_random_hex(12)
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Full API documentation available on: http://python-string-utils.readthedocs.org/en/latest/
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## Support the project!
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Do you like this project? Would you like to see it updated more often with new features and improvements?
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If so, you can make a small donation by clicking the button down below, it would be really appreciated! :)
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<a href="https://www.buymeacoffee.com/c4yYUvp" target="_blank">
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<img src="https://cdn.buymeacoffee.com/buttons/default-orange.png" width="217" height="51" />
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</a>

‎docs/_templates/layout.html‎

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{% extends '!layout.html' %}
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{% block document %}
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{{ super() }}
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<divstyle="padding: 30px 0 40px 0; border-top: 1px solid #ccc; margin-top: 30px">
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<h1>Support the project!</h1>
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<p>
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Do you like this project? Would you like to see it updated more often with new features and improvements?
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If so, you can make a small donation by clicking the button down below, it would be really appreciated! :)
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</p>
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<ahref="https://www.buymeacoffee.com/c4yYUvp"target="_blank">
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<imgsrc="https://cdn.buymeacoffee.com/buttons/default-orange.png"width="217"height="51"/>
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</a>
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</div>
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{% endblock %}

‎docs/index.rst‎

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@@ -32,7 +32,6 @@ The library basically consists in the python package `string_utils`, containing
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Plus a secondary package `tests` which includes several submodules.
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Specifically one for each test suite and named according to the api to test (eg. tests for `is_ip()`
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will be in `test_is_ip.py` and so on).
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All the public API are importable directly from the main package `string_utils`, so this:
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>>>from string_utils.validationimport is_ip

‎string_utils/generation.py‎

Lines changed: 34 additions & 11 deletions
Original file line numberDiff line numberDiff line change
@@ -19,9 +19,10 @@ def uuid(as_hex: bool = False) -> str:
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"""
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Generated an UUID string (using `uuid.uuid4()`).
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22-
*Example:*
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*Examples:*
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>>> uuid() # possible output: '97e3a716-6b33-4ab9-9bb1-8128cb24d76b'
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>>> uuid(as_hex=True) # possible output: '97e3a7166b334ab99bb18128cb24d76b'
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:param as_hex: True to return the hex value of the UUID, False to get its default representation (default).
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:return: uuid string.
@@ -60,7 +61,7 @@ def secure_random_hex(byte_count: int) -> str:
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"""
6162
Generates a random string using secure low level random generator (os.urandom).
6263
63-
BEAR IN MIND: due to hex conversion, the returned string will have a size that is exactly\
64+
**Bear in mind**: due to hex conversion, the returned string will have a size that is exactly\
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the double of the given `byte_count`.
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*Example:*
@@ -88,27 +89,49 @@ def roman_range(stop: int, start: int = 1, step: int = 1) -> Generator:
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*Example:*
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>>> for n in roman_range(7): print(n) # prints: I, II, III, IV, V, VI, VII
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>>> for n in roman_range(7): print(n)
93+
>>> # prints: I, II, III, IV, V, VI, VII
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>>> for n in roman_range(start=7, stop=1, step=-1): print(n)
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>>> # prints: VII, VI, V, IV, III, II, I
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:param stop: Number at which the generation must stop (must be <= 3999).
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:param start: Number at which the generation must start (must be >= 1).
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:param step: Increment of each generation step (default to 1).
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:return: Generator of roman numbers.
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"""
98102

99-
defvalidate(arg_value,arg_name):
100-
ifnotisinstance(arg_value,int)or (arg_value<1orarg_value>3999):
101-
raiseValueError('"{}" must be an integer in the range 1-3999'.format(arg_name))
103+
defvalidate(arg_value,arg_name,allow_negative=False):
104+
msg='"{}" must be an integer in the range 1-3999'.format(arg_name)
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ifnotisinstance(arg_value,int):
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raiseValueError(msg)
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ifallow_negative:
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arg_value=abs(arg_value)
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ifarg_value<1orarg_value>3999:
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raiseValueError(msg)
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defgenerate():
104-
current_step=start
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current=start
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# generate values for each step
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whilecurrent!=stop:
120+
yieldroman_encode(current)
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current+=step
105122

106-
whilecurrent_step<stop+1:
107-
yieldroman_encode(current_step)
108-
current_step+=step
123+
# last value to return
124+
yieldroman_encode(current)
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126+
# checks each single argument value
110127
validate(stop,'stop')
111128
validate(start,'start')
112-
validate(step,'step')
129+
validate(step,'step',allow_negative=True)
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# checks if the provided configuration leads to a feasible iteration with respect to boundaries or not
132+
forward_exceed=step>0and (start>stoporstart+step>stop)
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backward_exceed=step<0and (start<stoporstart+step<stop)
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ifforward_exceedorbackward_exceed:
135+
raiseOverflowError('Invalid start/stop/step configuration')
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returngenerate()

‎string_utils/manipulation.py‎

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Original file line numberDiff line numberDiff line change
@@ -404,24 +404,24 @@ def strip_html(input_string: str, keep_tag_content: bool = False) -> str:
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defprettify(input_string:str)->str:
406406
"""
407-
Turns an ugly textstringinto a beautiful oneby applyinga regex pipeline which ensures the following:
407+
Reformat astring by applyingthe following basic grammar and formatting rules:
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- String cannot start or end with spaces\
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-String cannot have multiple sequential spaces, empty lines orpunctuation (except for "?", "!" and ".")\
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-Arithmetic operators (+, -, /,\\*, =) must have one, and only one space beforeandafter themselves\
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-The first letter after a dot, an exclamation or a question mark must be uppercase\
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- One, and only one space should follow a dot, an exclamation or a question mark\
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- String cannot start or end with spaces
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-The first letter in the string and the ones after a dot, an exclamation ora question mark must be uppercase
411+
-String cannot have multiple sequential spaces, empty lines or punctuation (except for "?", "!"and".")
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-Arithmetic operators (+, -, /,\\*, =) must have one, and only one space before and after themselves
413+
- One, and only one space should follow a dot,a comma,an exclamation or a question mark
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- Text inside double quotes cannot start or end with spaces, but one, and only one space must come first and\
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after quotes (foo" bar"baz -> foo "bar" baz)
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- Text inside round brackets cannot start or end with spaces, but one, and only one space must come first and\
417-
after brackets ("foo(bar )baz" -> "foo (bar) baz")\
418-
- Percentage sign ("%") cannot be preceded by a space if there is a number before ("100 %" -> "100%")\
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after brackets ("foo(bar )baz" -> "foo (bar) baz")
418+
- Percentage sign ("%") cannot be preceded by a space if there is a number before ("100 %" -> "100%")
419419
- Saxon genitive is correct ("Dave' s dog" -> "Dave's dog")
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*Examples:*
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>>> prettify(' unprettified string ,, like this one,will be"prettified" .it\\' s awesome! ')
424-
>>> #the ouput will be: 'Unprettified string, like this one, will be "prettified". It\'s awesome!'
424+
>>> #-> 'Unprettified string, like this one, will be "prettified". It\'s awesome!'
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:param input_string: String to manipulate
427427
:return: Prettified string.
@@ -435,7 +435,7 @@ def asciify(input_string: str) -> str:
435435
Force string content to be ascii-only by translating all non-ascii chars into the closest possible representation
436436
(eg: ó -> o, Ë -> E, ç -> c...).
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438-
Some chars may be lost if impossible to translate.
438+
**Bear in mind**:Some chars may be lost if impossible to translate.
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*Example:*
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@@ -500,16 +500,21 @@ def slugify(input_string: str, separator: str = '-') -> str:
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defbooleanize(input_string:str)->bool:
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"""
502502
Turns a string into a boolean based on its content (CASE INSENSITIVE).
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A positive boolean (True) is returned if the string value is one of the following:
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- "true"
505507
- "1"
506508
- "yes"
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- "y"
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508511
Otherwise False is returned.
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*Example:*
513+
*Examples:*
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512515
>>> booleanize('true') # returns True
516+
>>> booleanize('YES') # returns True
517+
>>> booleanize('nope') # returns False
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:param input_string: String to convert
515520
:type input_string: str
@@ -525,6 +530,20 @@ def strip_margin(input_string: str) -> str:
525530
"""
526531
Removes tab indentation from multi line strings (inspired by analogous Scala function).
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*Example:*
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>>> strip_margin('''
536+
>>> line 1
537+
>>> line 2
538+
>>> line 3
539+
>>> ''')
540+
>>> # returns:
541+
>>> '''
542+
>>> line 1
543+
>>> line 2
544+
>>> line 3
545+
>>> '''
546+
528547
:param input_string: String to format
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:type input_string: str
530549
:return: A string without left margins
@@ -559,7 +578,7 @@ def compress(input_string: str, encoding: str = 'utf-8', compression_level: int
559578
560579
*Examples:*
561580
562-
>>> n = 0 # fix for Pycharm (not fixable using ignore comments)... ignore it
581+
>>> n = 0 #<- ignore this, it's afix for Pycharm (not fixable using ignore comments)
563582
>>> # "original" will be a string with 169 chars:
564583
>>> original = ' '.join(['word n{}'.format(n) for n in range(20)])
565584
>>> # "compressed" will be a string of 88 chars
@@ -592,6 +611,7 @@ def decompress(input_string: str, encoding: str = 'utf-8') -> str:
592611
defroman_encode(input_number:Union[str,int])->str:
593612
"""
594613
Convert the given number/string into a roman number.
614+
595615
The passed input must represents a positive integer in the range 1-3999 (inclusive).
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Why this limit? You may be wondering:

‎string_utils/validation.py‎

Lines changed: 22 additions & 23 deletions
Original file line numberDiff line numberDiff line change
@@ -204,11 +204,11 @@ def is_email(input_string: Any) -> bool:
204204
"""
205205
Check if a string is an email.
206206
207-
By design, the implementation of this checking does not follow the specification for a valid\
207+
By design, the implementation of this checking does notstrictlyfollow the specification for a valid\
208208
email address, but instead it's based on real world cases in order to match more than 99%\
209209
of emails and catch user mistakes. For example the percentage sign "%" is a valid sign for an email,\
210210
but actually no one use it, instead if such sign is found in a string coming from user input (like a\
211-
web form)is very likely thatthe intention was to type "5" (which is on the same key on a US keyboard).
211+
web form)it's very likely thatit's a mistake.
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213213
*Examples:*
214214
@@ -225,22 +225,21 @@ def is_email(input_string: Any) -> bool:
225225
defis_credit_card(input_string:Any,card_type:str=None)->bool:
226226
"""
227227
Checks if a string is a valid credit card number.
228-
If card type is provided then it checks that specific type,
228+
If card type is provided then it checksagainstthat specific type only,
229229
otherwise any known credit card number will be accepted.
230230
231-
:param input_string: String to check.
232-
:type input_string: str
233-
:param card_type: Card type. Can be one of these:
231+
Supported card types are the following:
234232
235-
* VISA
236-
* MASTERCARD
237-
* AMERICAN_EXPRESS
238-
* DINERS_CLUB
239-
* DISCOVER
240-
* JCB
241-
242-
or None. Default to None (any card).
233+
- VISA
234+
- MASTERCARD
235+
- AMERICAN_EXPRESS
236+
- DINERS_CLUB
237+
- DISCOVER
238+
- JCB
243239
240+
:param input_string: String to check.
241+
:type input_string: str
242+
:param card_type: Card type. Default to None (any card).
244243
:type card_type: str
245244
246245
:return: True if credit card, false otherwise.
@@ -290,10 +289,9 @@ def is_snake_case(input_string: Any, separator: str = '_') -> bool:
290289
291290
A string is considered snake case when:
292291
293-
* it's composed only by lowercase letters ([a-z]), underscores (or provided separator)\
294-
and optionally numbers ([0-9])
295-
* it does not start/end with an underscore (or provided separator)
296-
* it does not start with a number
292+
- it's composed only by lowercase/uppercase letters and digits
293+
- it contains at least one underscore (or provided separator)
294+
- it does not start with a number
297295
298296
*Examples:*
299297
@@ -511,7 +509,7 @@ def is_isogram(input_string: Any) -> bool:
511509

512510
defis_slug(input_string:Any,sign:str='-')->bool:
513511
"""
514-
Checks if a given string is a slug.
512+
Checks if a given string is a slug (as created by `slugify()`).
515513
516514
*Examples:*
517515
@@ -534,9 +532,10 @@ def is_slug(input_string: Any, sign: str = '-') -> bool:
534532

535533
defcontains_html(input_string:str)->bool:
536534
"""
537-
Checks if the given string contains html code.
538-
By design, this function is very permissive regarding what to consider html code, don't expect to use it
539-
as an html validator, its goal is to detect "malicious" or undesired html tags in the text.
535+
Checks if the given string contains HTML/XML tags.
536+
537+
By design, this function matches ANY type of tag, so don't expect to use it
538+
as an HTML validator, its goal is to detect "malicious" or undesired tags in the text.
540539
541540
*Examples:*
542541
@@ -565,7 +564,7 @@ def words_count(input_string: str) -> int:
565564
*Examples:*
566565
567566
>>> words_count('hello world') # returns 2
568-
>>> words_count('one,two,three') # returns3 (no need for spaces, punctuation is recognized!)
567+
>>> words_count('one,two,three.stop') # returns4
569568
570569
:param input_string: String to check.
571570
:type input_string: str

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