How do I create a multiline Python string with inline variables

Question

I am looking for a clean way to use variables within a multiline Python string  Say I wanted to do the following   string1   go string2   now string3   great      I will  string1 there I will go  string2  string3       I m looking to see if there is something similar to   in Perl to indicate a variable in the Python syntax   If not - what is the cleanest way to create a multiline string with variables

User · Answer

If anyone came here from python-graphql client looking for a solution to pass an object as variable here's what I used:

query = """
{{
  pairs(block: {block} first: 200, orderBy: trackedReserveETH, orderDirection: desc) {{
    id
    txCount
    reserveUSD
    trackedReserveETH
    volumeUSD
  }}
}}
""".format(block=''.join(['{number: ', str(block), '}']))

 query = gql(query)

Make sure to escape all curly braces like I did: "{{", "}}"

User · Answer

This is what you want    gt  gt  gt  string1    go   gt  gt  gt  string2    now   gt  gt  gt  string3    great   gt  gt  gt  mystring           I will  string1  there     I will go  string2       string3           gt  gt  gt  locals       builtins      lt module    builtin     built-in  gt    string3    great      package     None   mystring     nI will  string1  there nI will go  string2  n string3  n      name        main      string2    now      doc     None   string1    go    gt  gt  gt  print mystring format   locals      I will go there I will go now great

User · Answer

You can use Python 3 6 s f-strings for variables inside multi-line or lengthy single-line strings  You can manually specify newline characters using  n   Variables in a multi-line string  string1    go  string2    now  string3    great   multiline string    f I will  string1  there n                      f I will go  string2   n                      f  string3      print multiline string       I will go there   I will go now   great   Variables in a lengthy single-line string  string1    go  string2    now  string3    great   singleline string    f I will  string1  there                         f I will go  string2                          f  string3      print singleline string       I will go there  I will go now  great      Alternatively  you can also create a multiline f-string with triple quotes   multiline string   f   I will  string1  there  I will go  string2    string3

User · Answer

A dictionary can be passed to format    each key name will become a variable for each associated value   dict     string1    go            string2    now            string3    great    multiline string      I m will  string1  there I will go  string2   string3     format   dict   print multiline string     Also a list can be passed to format    the index number of each value will be used as variables in this case   list     go            now            great    multiline string      I m will  0  there I will go  1   2     format  list   print multiline string     Both solutions above will output the same      I m will go there   I will go now   great

User · Answer

The common way is the format   function    gt  gt  gt  s    This is an  example  with  vars   format vars  variables   example  example    gt  gt  gt  s  This is an example with variables    It works fine with a multi-line format string    gt  gt  gt  s            This is a  length  example      Here is a  ordinal  line           format length  multi-line   ordinal  second    gt  gt  gt  print s  This is a multi-line example  Here is a second line    You can also pass a dictionary with variables    gt  gt  gt  d      vars    variables    example    example     gt  gt  gt  s    This is an  example  with  vars    gt  gt  gt  s format   d   This is an example with variables    The closest thing to what you asked  in terms of syntax  are template strings  For example    gt  gt  gt  from string import Template  gt  gt  gt  t   Template  This is an  example with  vars    gt  gt  gt  t substitute    example    example    vars    variables     This is an example with variables    I should add though that the format   function is more common because it s readily available and it does not require an import line

User · Answer

NOTE  The recommended way to do string formatting in Python is to use format    as outlined in the accepted answer  I m preserving this answer as an example of the C-style syntax that s also supported     NOTE  format   is a better choice  string1    go  string2    now  string3    great   s       I will  s there I will go  s  s        string1  string2  string3   print s    Some reading    String formatting PEP 3101 -- Advanced String Formatting

User · Answer

f-strings  also called    formatted string literals     are string literals that have an f at the beginning  and curly braces containing expressions that will be replaced with their values  f-strings are evaluated at runtime  So your code can be re-written as  string1  quot go quot  string2  quot now quot  string3  quot great quot  print f quot  quot  quot  I will  string1  there I will go  string2   string3   quot  quot  quot    And this will evaluate to  I will go there I will go now great  You can learn more about it here

[python] How do I create a multiline Python string with inline variables?

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