我们从Python开源项目中，提取了以下50个代码示例，用于说明如何使用string.lstrip()。
def indentsize(line): """Return the indent size, in spaces, at the start of a line of text.""" expline = string.expandtabs(line) return len(expline) - len(string.lstrip(expline))
def cleandoc(doc): """Clean up indentation from docstrings. Any whitespace that can be uniformly removed from the second line onwards is removed.""" try: lines = string.split(string.expandtabs(doc), '\n') except UnicodeError: return None else: # Find minimum indentation of any non-blank lines after first line. margin = sys.maxint for line in lines[1:]: content = len(string.lstrip(line)) if content: indent = len(line) - content margin = min(margin, indent) # Remove indentation. if lines: lines[0] = lines[0].lstrip() if margin < sys.maxint: for i in range(1, len(lines)): lines[i] = lines[i][margin:] # Remove any trailing or leading blank lines. while lines and not lines[-1]: lines.pop() while lines and not lines[0]: lines.pop(0) return string.join(lines, '\n')
def calculate_action_url(login_form, result): if "://" not in login_form.action: url_parts = urlparse.urlparse(result.url) action_url = "%s://%s%s/%s" % (url_parts.scheme, url_parts.netloc, os.path.dirname(url_parts.path), string.lstrip(login_form.action, '.')) else: action_url = login_form.action logging.info("Calculated action_url as " + action_url) return action_url
def getdoc(object): """Get the documentation string for an object. All tabs are expanded to spaces. To clean up docstrings that are indented to line up with blocks of code, any whitespace than can be uniformly removed from the second line onwards is removed.""" try: doc = object.__doc__ except AttributeError: return None if not isinstance(doc, (str, unicode)): return None try: lines = string.split(string.expandtabs(doc), '\n') except UnicodeError: return None else: margin = None for line in lines[1:]: content = len(string.lstrip(line)) if not content: continue indent = len(line) - content if margin is None: margin = indent else: margin = min(margin, indent) if margin is not None: for i in range(1, len(lines)): lines[i] = lines[i][margin:] return string.join(lines, '\n')
def getcomments(object): """Get lines of comments immediately preceding an object's source code.""" try: lines, lnum = findsource(object) except IOError: return None if ismodule(object): # Look for a comment block at the top of the file. start = 0 if lines and lines[0][:2] == '#!': start = 1 while start < len(lines) and string.strip(lines[start]) in ['', '#']: start = start + 1 if start < len(lines) and lines[start][:1] == '#': comments = [] end = start while end < len(lines) and lines[end][:1] == '#': comments.append(string.expandtabs(lines[end])) end = end + 1 return string.join(comments, '') # Look for a preceding block of comments at the same indentation. elif lnum > 0: indent = indentsize(lines[lnum]) end = lnum - 1 if end >= 0 and string.lstrip(lines[end])[:1] == '#' and \ indentsize(lines[end]) == indent: comments = [string.lstrip(string.expandtabs(lines[end]))] if end > 0: end = end - 1 comment = string.lstrip(string.expandtabs(lines[end])) while comment[:1] == '#' and indentsize(lines[end]) == indent: comments[:0] = [comment] end = end - 1 if end < 0: break comment = string.lstrip(string.expandtabs(lines[end])) while comments and string.strip(comments[0]) == '#': comments[:1] = [] while comments and string.strip(comments[-1]) == '#': comments[-1:] = [] return string.join(comments, '')
def _accept(prefix): return string.lstrip(prefix)[:7] == "#define" ## # Image plugin for X11 bitmaps.
def split_quoted (s): """Split a string up according to Unix shell-like rules for quotes and backslashes. In short: words are delimited by spaces, as long as those spaces are not escaped by a backslash, or inside a quoted string. Single and double quotes are equivalent, and the quote characters can be backslash-escaped. The backslash is stripped from any two-character escape sequence, leaving only the escaped character. The quote characters are stripped from any quoted string. Returns a list of words. """ # This is a nice algorithm for splitting up a single string, since it # doesn't require character-by-character examination. It was a little # bit of a brain-bender to get it working right, though... if _wordchars_re is None: _init_regex() s = string.strip(s) words = [] pos = 0 while s: m = _wordchars_re.match(s, pos) end = m.end() if end == len(s): words.append(s[:end]) break if s[end] in string.whitespace: # unescaped, unquoted whitespace: now words.append(s[:end]) # we definitely have a word delimiter s = string.lstrip(s[end:]) pos = 0 elif s[end] == '\\': # preserve whatever is being escaped; # will become part of the current word s = s[:end] + s[end+1:] pos = end+1 else: if s[end] == "'": # slurp singly-quoted string m = _squote_re.match(s, end) elif s[end] == '"': # slurp doubly-quoted string m = _dquote_re.match(s, end) else: raise RuntimeError, \ "this can't happen (bad char '%c')" % s[end] if m is None: raise ValueError, \ "bad string (mismatched %s quotes?)" % s[end] (beg, end) = m.span() s = s[:beg] + s[beg+1:end-1] + s[end:] pos = m.end() - 2 if pos >= len(s): words.append(s) break return words # split_quoted ()
def getcomments(object): """Get lines of comments immediately preceding an object's source code. Returns None when source can't be found. """ try: lines, lnum = findsource(object) except (IOError, TypeError): return None if ismodule(object): # Look for a comment block at the top of the file. start = 0 if lines and lines[0][:2] == '#!': start = 1 while start < len(lines) and string.strip(lines[start]) in ('', '#'): start = start + 1 if start < len(lines) and lines[start][:1] == '#': comments = [] end = start while end < len(lines) and lines[end][:1] == '#': comments.append(string.expandtabs(lines[end])) end = end + 1 return string.join(comments, '') # Look for a preceding block of comments at the same indentation. elif lnum > 0: indent = indentsize(lines[lnum]) end = lnum - 1 if end >= 0 and string.lstrip(lines[end])[:1] == '#' and \ indentsize(lines[end]) == indent: comments = [string.lstrip(string.expandtabs(lines[end]))] if end > 0: end = end - 1 comment = string.lstrip(string.expandtabs(lines[end])) while comment[:1] == '#' and indentsize(lines[end]) == indent: comments[:0] = [comment] end = end - 1 if end < 0: break comment = string.lstrip(string.expandtabs(lines[end])) while comments and string.strip(comments[0]) == '#': comments[:1] = [] while comments and string.strip(comments[-1]) == '#': comments[-1:] = [] return string.join(comments, '')
