Initial commit

core/utils/string.py

@@ -0,0 +1,41 @@
+__author__ = 'fergalm'
+import re
+
+def lreplace(string, pattern, sub):
+    """
+    Replaces 'pattern' in 'string' with 'sub' if 'pattern' starts 'string'.
+    """
+    return re.sub('^%s' % pattern, sub, string)
+
+def rreplace(string, pattern, sub):
+    """
+    Replaces 'pattern' in 'string' with 'sub' if 'pattern' ends 'string'.
+    """
+    return re.sub('%s$' % pattern, sub, string)
+
+def is_number(s):
+    try:
+        if len(s) > 0:
+            float(s)
+            return True
+    except ValueError:
+        pass
+    except IndexError:
+        pass
+    except Exception:
+        pass
+
+    return False
+
+def trunc_lines(s, linecount):
+    ret = ""
+    cur = 0
+    for line in s.splitlines():
+        if cur < linecount:
+            ret += line + "\n"
+            cur += 1
+        else:
+            break
+
+    return ret
+