syntax tweaks

fil_finder/filfinder2D.py

@@ -247,7 +247,7 @@ def create_mask(self, glob_thresh=None, adapt_thresh=None,
         size_thresh : int, optional
             This sets the lower threshold on the size of objects found in the
             adaptive thresholding. If None, the value is set at
-            :math:`5\pi (0.1 \text(pc))^2` which is the area of the minimum dimensions
+            :math:`5\\pi (0.1 \text(pc))^2` which is the area of the minimum dimensions
             expected for a filament. Any region smaller than this threshold may be
             safely labeled as an artifact of the thresholding.
         glob_thresh : float, optional

fil_finder/io_funcs.py

@@ -115,9 +115,10 @@ def convert_bunit(bunit):
     unit : `~astropy.unit.Unit`
         Corresponding unit.
     '''
-
+    import re 
+
     # special case: CASA (sometimes) makes non-FITS-compliant jy/beam headers
-    bunit_lower = re.sub("\s", "", bunit.lower())
+    bunit_lower = re.sub(r"\s", "", bunit.lower())
     if bunit_lower == 'jy/beam':
         unit = u.Jy / u.beam
     else:

fil_finder/width.py

@@ -478,10 +478,10 @@ def radial_profile(img, dist_transform_all, dist_transform_sep, offsets,
     if bins is None:
         nbins = int(np.sqrt(len(width_value)))
         maxbin = np.max(width_distance)
-        if bintype is "log":
+        if bintype == "log":
             # bins must start at 1 if logspaced
             bins = np.logspace(0, np.log10(maxbin), nbins + 1)
-        elif bintype is "linear":
+        elif bintype == "linear":
             bins = np.linspace(0, maxbin, nbins + 1)
 
     whichbins = np.digitize(width_distance, bins)