diff options
Diffstat (limited to 'Lib/distutils/text_file.py')
| -rw-r--r-- | Lib/distutils/text_file.py | 56 |
1 files changed, 30 insertions, 26 deletions
diff --git a/Lib/distutils/text_file.py b/Lib/distutils/text_file.py index 7b29ef4..f22b3e9 100644 --- a/Lib/distutils/text_file.py +++ b/Lib/distutils/text_file.py @@ -9,18 +9,18 @@ lines, and joining lines with backslashes.""" __revision__ = "$Id$" from types import * -import sys, os, string, re +import sys, os, string class TextFile: """Provides a file-like object that takes care of all the things you commonly want to do when processing a text file that has some - line-by-line syntax: strip comments (as long as "#" is your comment - character), skip blank lines, join adjacent lines by escaping the - newline (ie. backslash at end of line), strip leading and/or - trailing whitespace, and collapse internal whitespace. All of these - are optional and independently controllable. + line-by-line syntax: strip comments (as long as "#" is your + comment character), skip blank lines, join adjacent lines by + escaping the newline (ie. backslash at end of line), strip + leading and/or trailing whitespace. All of these are optional + and independently controllable. Provides a 'warn()' method so you can generate warning messages that report physical line number, even if the logical line in question @@ -50,7 +50,7 @@ class TextFile: each line before returning it skip_blanks [default: true} skip lines that are empty *after* stripping comments and - whitespace. (If both lstrip_ws and rstrip_ws are true, + whitespace. (If both lstrip_ws and rstrip_ws are false, then some lines may consist of solely whitespace: these will *not* be skipped, even if 'skip_blanks' is true.) join_lines [default: false] @@ -59,12 +59,9 @@ class TextFile: to it to form one "logical line"; if N consecutive lines end with a backslash, then N+1 physical lines will be joined to form one logical line. - collapse_ws [default: false] - after stripping comments and whitespace and joining physical - lines into logical lines, all internal whitespace (strings of - whitespace surrounded by non-whitespace characters, and not at - the beginning or end of the logical line) will be collapsed - to a single space. + collapse_join [default: false] + strip leading whitespace from lines that are joined to their + predecessor; only matters if (join_lines and not lstrip_ws) Note that since 'rstrip_ws' can strip the trailing newline, the semantics of 'readline()' must differ from those of the builtin file @@ -75,10 +72,10 @@ class TextFile: default_options = { 'strip_comments': 1, 'skip_blanks': 1, - 'join_lines': 0, 'lstrip_ws': 0, 'rstrip_ws': 1, - 'collapse_ws': 0, + 'join_lines': 0, + 'collapse_join': 0, } def __init__ (self, filename=None, file=None, **options): @@ -219,6 +216,8 @@ class TextFile: "end-of-file") return buildup_line + if self.collapse_join: + line = string.lstrip (line) line = buildup_line + line # careful: pay attention to line number when incrementing it @@ -261,10 +260,6 @@ class TextFile: buildup_line = line[0:-2] + '\n' continue - # collapse internal whitespace (*after* joining lines!) - if self.collapse_ws: - line = re.sub (r'(\S)\s+(\S)', r'\1 \2', line) - # well, I guess there's some actual content there: return it return line @@ -295,7 +290,7 @@ if __name__ == "__main__": test_data = """# test file line 3 \\ -continues on next line + continues on next line """ @@ -303,16 +298,21 @@ continues on next line result1 = map (lambda x: x + "\n", string.split (test_data, "\n")[0:-1]) # result 2: just strip comments - result2 = ["\n", "\n", "line 3 \\\n", "continues on next line\n"] + result2 = ["\n", "\n", "line 3 \\\n", " continues on next line\n"] # result 3: just strip blank lines - result3 = ["# test file\n", "line 3 \\\n", "continues on next line\n"] + result3 = ["# test file\n", "line 3 \\\n", " continues on next line\n"] # result 4: default, strip comments, blank lines, and trailing whitespace - result4 = ["line 3 \\", "continues on next line"] + result4 = ["line 3 \\", " continues on next line"] - # result 5: full processing, strip comments and blanks, plus join lines - result5 = ["line 3 continues on next line"] + # result 5: strip comments and blanks, plus join lines (but don't + # "collapse" joined lines + result5 = ["line 3 continues on next line"] + + # result 6: strip comments and blanks, plus join lines (and + # "collapse" joined lines + result6 = ["line 3 continues on next line"] def test_input (count, description, file, expected_result): result = file.readlines () @@ -349,7 +349,11 @@ continues on next line in_file = TextFile (filename, strip_comments=1, skip_blanks=1, join_lines=1, rstrip_ws=1) - test_input (5, "full processing", in_file, result5) + test_input (5, "join lines without collapsing", in_file, result5) + + in_file = TextFile (filename, strip_comments=1, skip_blanks=1, + join_lines=1, rstrip_ws=1, collapse_join=1) + test_input (6, "join lines with collapsing", in_file, result6) os.remove (filename) |