More compiled regular expressions

sebastinas · sebastinas · commit 8a7e5d4ef239 · 2015-02-02T23:31:21.000+01:00
Signed-off-by: Sebastian Ramacher &lt;sebastian+dev@ramacher.at&gt;
diff --git a/bpython/curtsiesfrontend/preprocess.py b/bpython/curtsiesfrontend/preprocess.py
@@ -1,8 +1,13 @@
 """Tools for preparing code to be run in the REPL (removing blank lines, etc)"""
-import re
+
+from bpython.lazyre import LazyReCompile
 
 #TODO specifically catch IndentationErrors instead of any syntax errors
 
+
+indent_empty_lines_re = LazyReCompile(r'\s*')
+
+
 def indent_empty_lines(s, compiler):
     """Indents blank lines that would otherwise cause early compilation
 
@@ -16,8 +21,8 @@ def indent_empty_lines(s, compiler):
 
     for p_line, line, n_line in zip([''] + lines[:-1], lines, lines[1:] + ['']):
         if len(line) == 0:
-            p_indent = re.match(r'\s*', p_line).group()
-            n_indent = re.match(r'\s*', n_line).group()
+            p_indent = indent_empty_lines_re.match(p_line).group()
+            n_indent = indent_empty_lines_re.match(n_line).group()
             result_lines.append(min([p_indent, n_indent], key=len) + line)
         else:
             result_lines.append(line)
diff --git a/bpython/inspection.py b/bpython/inspection.py
@@ -26,12 +26,12 @@
 import inspect
 import keyword
 import pydoc
-import re
 import types
 
 from pygments.token import Token
 
 from bpython._py3compat import PythonLexer, py3
+from bpython.lazyre import LazyReCompile
 
 try:
     collections.Callable
@@ -45,7 +45,7 @@
     has_instance_type = False
 
 if not py3:
-    _name = re.compile(r'[a-zA-Z_]\w*$')
+    _name = LazyReCompile(r'[a-zA-Z_]\w*$')
 
 
 class AttrCleaner(object):
@@ -175,14 +175,16 @@ def fixlongargs(f, argspec):
     argspec[3] = values
 
 
+getpydocspec_re = LazyReCompile(r'([a-zA-Z_][a-zA-Z0-9_]*?)\((.*?)\)')
+
+
 def getpydocspec(f, func):
     try:
         argspec = pydoc.getdoc(f)
     except NameError:
         return None
 
-    rx = re.compile(r'([a-zA-Z_][a-zA-Z0-9_]*?)\((.*?)\)')
-    s = rx.search(argspec)
+    s = getpydocspec_re.search(argspec)
     if s is None:
         return None
 
@@ -272,9 +274,12 @@ def is_callable(obj):
         return callable(obj)
 
 
+get_encoding_re = LazyReCompile(r'coding[:=]\s*([-\w.]+)')
+
+
 def get_encoding(obj):
     for line in inspect.findsource(obj)[0][:2]:
-        m = re.search(r'coding[:=]\s*([-\w.]+)', line)
+        m = get_encoding_re.search(line)
         if m:
             return m.group(1)
     return 'ascii'
