* text_tools: Added str_fmt_heading() function for formatting table heading

a la printf.
master
Wirawan Purwanto 11 years ago
parent 579be3e18a
commit 9a5d2dfa9f
  1. 45
      text_tools.py

@ -89,6 +89,24 @@ def str_snippet(S):
file segments.""" file segments."""
return str_unindent(S).rstrip() return str_unindent(S).rstrip()
def str_trunc_begin(S, L):
"""Returns a possibly truncated S (ellipsis added at the string's
beginning) if the length of S is greater than L.
L should be equal to or greater than 3 to be making sense."""
if len(S) > L:
return "..." + S[min(-L+3,0):]
else:
return S
def str_trunc_end(S, L):
"""Returns a possibly truncated S (ellipsis added at the string's
ending) if the length of S is greater than L.
L should be equal to or greater than 3 to be making sense."""
if len(S) > L:
return S[:max(L-3,0)] + "..."
else:
return S
def str_save_to_file(filename, s1, *more_str, **opts): def str_save_to_file(filename, s1, *more_str, **opts):
"""Save one or more string (or iterables) to a file with a given file. """Save one or more string (or iterables) to a file with a given file.
@ -133,6 +151,32 @@ def str_expand(template, params, maxiter=100):
return str1 return str1
# Internal variable: don't mess!
_str_fmt_heading_rx = None
def str_fmt_heading(fmt):
"""Replaces a printf-style formatting with one suitable for table heading:
all non-string conversions are replaced with string conversions,
preserving the minimum widths."""
# Originally from: $PWQMC77/scripts/cost.py and later Cr2_analysis_cbs.py .
#
#_str_fmt_heading_rx = None # only for development purposes
import re
if _str_fmt_heading_rx == None:
# Because of complicated regex, I verbosely write it out here:
_str_fmt_heading_rx = re.compile(r"""
(
% # % sign
(?:\([^)]+\))? # optional '(keyname)' mapping key
[-+#0 hlL]* # optional conversion flag
[0-9*]* # optional minimum field width
)
((?:\.[0-9]*)?) # optional precision
[^-+#*0 hlL0-9.%s] # not conv flag, dimensions, nor literal '%',
# nor 's' conversion specifiers
""", re.VERBOSE)
return _str_fmt_heading_rx.sub(r'\1s', fmt)
def str_grep(S, strs): def str_grep(S, strs):
"""Returns a list of strings wherein the substring S is found.""" """Returns a list of strings wherein the substring S is found."""
return [s for s in strs if s.find(S) >= 0] return [s for s in strs if s.find(S) >= 0]
@ -144,6 +188,7 @@ def str_igrep(S, strs):
#return [i for (s,i) in zip(strs,xrange(len(strs))) if s.find(S) >= 0] #return [i for (s,i) in zip(strs,xrange(len(strs))) if s.find(S) >= 0]
def slice_str(s): def slice_str(s):
return "%s:%s:%s" % ( return "%s:%s:%s" % (
ifelse(s.start == None, "", str(s.start)), ifelse(s.start == None, "", str(s.start)),

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