How to strip all whitespace from string

Question

How do I strip all the spaces in a python string  For example  I want a string like strip my spaces to be turned into stripmyspaces  but I cannot seem to accomplish that with strip      gt  gt  gt   strip my spaces  strip    strip my spaces

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Alternatively    strip my spaces  translate  None  string whitespace     And here is Python3 version    strip my spaces  translate str maketrans         string whitespace

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TL DR  This solution was tested using Python 3 6  To strip all spaces from a string in Python3 you can use the following function   def remove spaces in string  str       return in string translate str maketrans              To remove any whitespace characters     t n r x0b x0c   you can use the following function   import string def remove whitespace in string  str       return in string translate str maketrans dict fromkeys string whitespace      Explanation  Python s str translate method is a built-in class method of str  it takes a table and returns a copy of the string with each character mapped through the passed translation table  Full documentation for str translate  To create the translation table str maketrans is used  This method is another built-in class method of str  Here we use it with only one parameter  in this case a dictionary  where the keys are the characters to be replaced mapped to values with the characters replacement value  It returns a translation table for use with str translate  Full documentation for str maketrans  The string module in python contains some common string operations and constants  string whitespace is a constant which returns a string containing all ASCII characters that are considered whitespace  This includes the characters space  tab  linefeed  return  formfeed  and vertical tab Full documentation for string  In the second function dict fromkeys is used to create a dictionary where the keys are the characters in the string returned by string whitespace each with value None  Full documentation for dict fromkeys

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If optimal performance is not a requirement and you just want something dead simple  you can define a basic function to test each character using the string class s built in  isspace  method   def remove space input string       no white space          for c in input string          if not c isspace                no white space    c     return no white space   Building the no white space string this way will not have ideal performance  but the solution is easy to understand    gt  gt  gt  remove space  strip my spaces    stripmyspaces    If you don t want to define a function  you can convert this into something vaguely similar with list comprehension  Borrowing from the top answer s join solution    gt  gt  gt     join  c for c in  strip my spaces  if not c isspace      stripmyspaces

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For Python 3   gt  gt  gt  import re  gt  gt  gt  re sub r  s         strip my  n t r ASCII and  u00A0  u2003 Unicode spaces    stripmyASCIIandUnicodespaces   gt  gt  gt    Or  depending on the situation   gt  gt  gt  re sub r   s  u180B  u200B  u200C  u200D  u2060  uFEFF                 uFEFF t t t strip all  u000A kinds of  u200B whitespace  n    stripallkindsofwhitespace      handles any whitespace characters that you re not thinking of - and believe us  there are plenty   s on its own always covers the ASCII whitespace    regular  space tab new line   n  carriage return   r  form feed vertical tab  Additionally   for Python 2 with re UNICODE enabled  for Python 3 without any extra actions       s also covers the Unicode whitespace characters  for example   non-breaking space  em space  ideographic space      etc  See the full list here  under  quot Unicode characters with White Space property quot   However  s DOES NOT cover characters not classified as whitespace  which are de facto whitespace  such as among others   zero-width joiner  Mongolian vowel separator  zero-width non-breaking space  a k a  byte order mark       etc  See the full list here  under  quot Related Unicode characters without White Space property quot   So these 6 characters are covered by the list in the second regex   u180B  u200B  u200C  u200D  u2060  uFEFF  Sources   https   docs python org 2 library re html https   docs python org 3 library re html https   en wikipedia org wiki Unicode character property

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Remove the Starting Spaces in Python  string1      This is Test String to strip leading space  print string1 print string1 lstrip     Remove the Trailing or End Spaces in Python  string2  This is Test String to strip trailing space       print string2 print string2 rstrip     Remove the whiteSpaces from Beginning and end of the string in Python  string3      This is Test String to strip leading and trailing space        print string3 print string3 strip     Remove all the spaces in python  string4     This is Test String to test all the spaces          print string4 print string4 replace

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The simplest is to use replace    foo bar t  replace          replace   t         Alternatively  use a regular expression   import re re sub r  s        foo bar t

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import re re sub         strip my spaces

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The standard techniques to filter a list apply  although they are not as efficient as the split join or translate methods   We need a set of whitespaces    gt  gt  gt  import string  gt  gt  gt  ws   set string whitespace    The filter builtin    gt  gt  gt     join filter lambda c  c not in ws   strip my spaces     stripmyspaces    A list comprehension  yes  use the brackets  see benchmark below     gt  gt  gt  import string  gt  gt  gt     join  c for c in  strip my spaces  if c not in ws    stripmyspaces    A fold    gt  gt  gt  import functools  gt  gt  gt     join functools reduce lambda acc  c  acc if c in ws else acc c   strip my spaces     stripmyspaces    Benchmark    gt  gt  gt  from timeit import timeit  gt  gt  gt  timeit     join  strip my spaces  split      0 17734256500003198  gt  gt  gt  timeit   strip my spaces  translate ws dict     import string  ws dict    ord ws  None for ws in string whitespace    0 457635745999994  gt  gt  gt  timeit  re sub r  s         strip my spaces      import re   1 017787621000025   gt  gt  gt  SETUP    import string  operator  functools  itertools  ws   set string whitespace    gt  gt  gt  timeit     join  c for c in  strip my spaces  if c not in ws     SETUP  0 6484303600000203  gt  gt  gt  timeit     join c for c in  strip my spaces  if c not in ws    SETUP  0 950212219999969  gt  gt  gt  timeit     join filter lambda c  c not in ws   strip my spaces      SETUP  1 3164566040000523  gt  gt  gt  timeit     join functools reduce lambda acc  c  acc if c in ws else acc c   strip my spaces      SETUP  1 6947649049999995

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Taking advantage of str split s behavior with no sep parameter    gt  gt  gt  s      t foo  n bar    gt  gt  gt     join s split     foobar    If you just want to remove spaces instead of all whitespace    gt  gt  gt  s replace            tfoo nbar    Premature optimization  Even though efficiency isn t the primary goal   writing clear code is   here are some initial timings     python -m timeit     join    t foo  n bar   split     1000000 loops  best of 3  1 38 usec per loop   python -m timeit -s  import re   re sub r  s           t foo  n bar     100000 loops  best of 3  15 6 usec per loop   Note the regex is cached  so it s not as slow as you d imagine   Compiling it beforehand helps some  but would only matter in practice if you call this many times     python -m timeit -s  import re  e   re compile r  s      e sub        t foo  n bar     100000 loops  best of 3  7 76 usec per loop   Even though re sub is 11 3x slower  remember your bottlenecks are assuredly elsewhere   Most programs would not notice the difference between any of these 3 choices

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Try a regex with re sub  You can search for all whitespace and replace with an empty string    s in your pattern will match whitespace characters - and not just a space  tabs  newlines  etc   You can read more about it in the manual

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As mentioned by Roger Pate following code worked for me   s      t foo  n bar      join s split     foobar    I am using Jupyter Notebook to run following code   i 0 ProductList    while i  lt  len new list       temp                                 new list i  temp   Plain   Utthapam        temp new list i  strip             if we want o p as   Plain Utthapam     temp    join new list i  split      o p   PlainUtthapam      temp temp upper                     o p  PLAINUTTHAPAM      ProductList append temp     i i 2

[python] How to strip all whitespace from string

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