str_methods.ClassWithCutting__format__ Class Reference

Public Member Functions
	__init__ (self, value)
	__format__ (self, fmt)

Data Fields
	value

Detailed Description

This class provides a __format__ method which cuts values to a certain width.

If width is too big '...' will be put at the end of the resulting string.

Definition at line 85 of file str_methods.py.

Constructor & Destructor Documentation

__init__()

str_methods.ClassWithCutting__format__.__init__	(		self,
			value
	)

Definition at line 90 of file str_methods.py.

    def __init__(self,value):
      self.value = value
 

Member Function Documentation

__format__()

str_methods.ClassWithCutting__format__.__format__	(		self,
			fmt
	)

Definition at line 93 of file str_methods.py.

    def __format__(self, fmt):
        def get_width(fmt_spec):
            """Parse fmt_spec to obtain width"""
 
            def remove_alignment(fmt_spec):
                if fmt_spec[1] in ["<","^",">"]:
                    fmt_spec=fmt_spec[2:len(fmt_spec)]
                return fmt_spec
 
            def remove_sign(fmt_spec):
                if fmt_spec[0] in ["-","+"," "]:
                    fmt_spec=fmt_spec[1:len(fmt_spec)]
                return fmt_spec
 
            def remove_cross(fmt_spec):
                if fmt_spec[0] in ["#"]:
                    fmt_spec=fmt_spec[1:len(fmt_spec)]
                return fmt_spec
 
            def do_width(fmt_spec):
                n=""
 
                while len(fmt_spec)>0:
                    if fmt_spec[0].isdigit():
                      n+=fmt_spec[0]
                      fmt_spec=fmt_spec[1:len(fmt_spec)]
                    else:
                        break
                if n:
                    return int(n)
                else:
                    return None
 
            if len(fmt_spec)>=2:
                fmt_spec=remove_alignment(fmt_spec)
            if len(fmt_spec)>=1:
               fmt_spec=remove_sign(fmt_spec)
            if len(fmt_spec)>=1:
                fmt_spec=remove_cross(fmt_spec)
            width=do_width(fmt_spec)
            # Stop parsing here for we only need width
 
            return width
 
        def cut(s, width, replace_string="..."):
            """Cuts s to width and puts replace_string at it's end."""
 
            #s=s.decode('UTF-8', "replace")
 
            if len(s)>width:
                if len(replace_string)>width:
                    replace_string=replace_string[0:width]
                s=s[0:width-len(replace_string)]
                s=s+replace_string
 
            return s
 
        value=self.value
 
        # Replace Tabs and linebreaks
        #import types
        if isinstance(value, str):
            value = value.replace("\t","|")
            value = value.replace("\n","|")
 
        # Do regular formatting of object
        value = value.__format__(fmt)
 
        # Cut resulting value if longer than specified by width
        width = get_width(fmt)
        if width:
            value = cut(value, width, "...")
 
        return value
 

Field Documentation

value

str_methods.ClassWithCutting__format__.value

Definition at line 91 of file str_methods.py.

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The documentation for this class was generated from the following file:

• str_methods.py