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I need to get certain words out from a string in to a new format. For example, I call the function with the input:

text2function('$sin (x)$ is an function of x')

and I need to put them into a StringFunction:

StringFunction(function, independent_variables=[vari])

where I need to get just 'sin (x)' for function and 'x' for vari. So it would look like this finally:

StringFunction('sin (x)', independent_variables=['x']

problem is, I can't seem to obtain function and vari. I have tried:

start = string.index(start_marker) + len(start_marker)
end = string.index(end_marker, start)
return string[start:end]

and

r = re.compile('$()$')
m = r.search(string)
if m:
     lyrics = m.group(1)

and

send = re.findall('$([^"]*)$',string)

all seems to seems to give me nothing. Am I doing something wrong? All help is appreciated. Thanks.

Tweeky way!

>>> char1 = '('
>>> char2 = ')'
>>> mystr = "mystring(123234sample)"
>>> print mystr[mystr.find(char1)+1 : mystr.find(char2)]
123234sample

Find string between two substrings, Tweeky way! >>> char1 = '(' >>> char2 = ')' >>> mystr = "mystring(123234sample)​" >>> print mystr[mystr.find(char1)+1 : mystr.find(char2)]  Note: This code is written in Python 2. string = "sri[nivas]silveri" firstDelPos=string.find("[") # get the position of delimiter [ secondDelPos=string.find("]") # get the position of delimiter ] extractedString = string[firstDelPos+1:secondDelPos] # get the string between two dels print extractedString # print the extracted string between two dels

$ is a special character in regex (it denotes the end of the string). You need to escape it:

>>> re.findall(r'\$(.*?)\$', '$sin (x)$ is an function of x')
['sin (x)']

getting string between 2 characters in python, Use this regex: period_1_(.*)\.ssa. For example, in Perl you would extract it like this: my ($substr) = ($string =~ /period_1_(.*)\.ssa/);. For Python, use this code: For example # my first string myString = "Hello there !bob@" #my sub string subString = #whatever i need to do here to return JUST bob Python - Get a substring from between two characters FAQ

If you want to cut a string between two identical characters (i.e, !234567890!) you can use

   line_word = line.split('!')
   print (line_word[1])

RegEx to return string between 2 specific characters?, In Python, in a string, how can you grab all the text between two words in a string without knowing How do you count the number of times words appear in strings (Python)? How do I get the class name of an object as a string in Python​? Python offers many ways to substring a string. It is often called ‘slicing’. It follows this template: string[start: end: step] Where, start: The starting index of the substring. The character at this index is included in the substring. If start is not included, it is assumed to equal to 0. end: The terminating index of the substring. The character at this index is NOT included in the

You need to start searching for the second character beyond start:

end = string.index(end_marker, start + 1)

because otherwise it'll find the same character at the same location again:

>>> start_marker = end_marker = '$'
>>> string = '$sin (x)$ is an function of x'
>>> start = string.index(start_marker) + len(start_marker)
>>> end = string.index(end_marker, start + 1)
>>> string[start:end]
'sin (x)'

For your regular expressions, the $ character is interpreted as an anchor, not the literal character. Escape it to match the literal $ (and look for things that are not $ instead of not ":

send = re.findall('\$([^$]*)\$', string)

which gives:

>>> import re
>>> re.findall('\$([^$]*)\$', string)
['sin (x)']

The regular expression $()$ otherwise doesn't really match anything between the parenthesis even if you did escape the $ characters.

In Python, in a string, how can you grab all the text between two , Python - Get a substring from between two characters. Thread: Python Code: [​View]. File "subsearch.py", line 2 myString=[myString.find("! Since, the string is also a sequence of characters in Python like lists, tuple, range etc. As per the topic, we will only focus on string sequence and show you the examples of getting the substring by using extended slicing. See the example below of getting a substring by using extended slicing: See online demo and code

Python - Get a substring from between two characters, The extracted substring does not include startStr and endStr . newStr is a string array if str is a string array. Otherwise, newStr is a cell array of character vectors. Python Basic - 1: Exercise-93 with Solution. Write a Python program to find the middle character(s) of a given string. If the length of the string is odd return the middle character and return the middle two characters if the string length is even.

Extract substrings between start and end points, AryanSingh December 12, 2019, 2:22am #1. Hello guys. I am struggling with how to extract a dynamic string between two particular string! Online regex tester and debugger: PHP, PCRE, Python, Golang and JavaScript. If you want to cut a string between two identical characters (i.e, !234567890!) you can use . line_word = line.split('!') print (line_word[1])

Extract string between two strings - Build, How could I get python to print the text between two specific strings from the source code of a RandellDawson February 9, 2020, 1:36am #2. Python Split String By Character Tutorial – Getting Started With Examples When splitting string, it takes one string and break it into two or more lists of substrings. Some time we may need to break a large string into smaller strings. For splitting string python provides a function called split ().

Comments
  • I really like this solution for what I am doing.
  • Great solution! I incorporated it as a lambda for easy re-use: GetValue = lambda mystr: mystr[mystr.find(char1) + 1 : mystr.find(char2)]