Functionalities

pyzdde/zdde.py

@@ -616,7 +616,17 @@ def apr(self):
     def apr(self, val):
         self._apr = val
 
-
+    @property
+    def connection(self):
+        """Checks status of connection
+
+        Returns
+        -------
+        status: bool
+            True = connection online
+            False = connection offline
+        """
+        return self._connection
 
     # ZEMAX <--> PyZDDE client connection methods
     #--------------------------------------------
@@ -9776,8 +9786,13 @@ def zGetZernike(self, which='fringe', settingsFile=None, txtFile=None,
                          "Maximum fit error"]
         meta = []
         for i, pat in enumerate(meta_patterns):
-            meta_line = line_list[_getFirstLineOfInterest(line_list, pat)]
-            meta.append(float(_re.search(r'\d{1,3}\.\d{4,8}', meta_line).group()))
+
+            line_index = _getFirstLineOfInterest(line_list, pat)
+            if line_index is not None:
+                meta_line = line_list[line_index]
+                meta.append(float(_re.search(r'\d{1,3}\.\d{4,8}', meta_line).group()))
+            else:
+                meta.append(_math.nan)
 
         info = _co.namedtuple('zInfo', ['pToVChief', 'pToVCentroid', 'rmsToChief',
                                         'rmsToCentroid', 'variance', 'strehl',
@@ -9787,14 +9802,26 @@ def zGetZernike(self, which='fringe', settingsFile=None, txtFile=None,
         # Extract coefficients
         start_line_pat = "Z\s+1\s+-?\d{1,3}\.\d{4,8}"
         start_line = _getFirstLineOfInterest(line_list, start_line_pat)
-        coeff_pat = _re.compile("-?\d{1,3}\.\d{4,8}")
-        zCoeffs = [0]*(line_list_len - start_line)
+        if start_line is not None:  # Zernikes obtained successfully
+            coeff_pat = _re.compile("-?\d{1,3}\.\d{4,8}")
+            zCoeffs = [0] * (line_list_len - start_line)
+
+            for i, line in enumerate(line_list[start_line:]):
+                zCoeffs[i] = float(_re.findall(coeff_pat, line)[0])
+
+            zCoeffId = _co.namedtuple('zCoeff', ['Z{}'.format(i + 1) for i in range(line_list_len - start_line)])
+
+        else:  # Zernikes were not obtained
+            # Return maximum amount of zernike coefficients, filled with NaN
+            if which.lower() == 'fringe':
+                maxZern = 37  # maximum for the fringe zernike coefficients
+            else:
+                maxZern = 231  # maximum for standard and annular zernike coefficients
+
+            zCoeffs = [_math.nan] * maxZern
 
-        for i, line in enumerate(line_list[start_line:]):
-            zCoeffs[i] = float(_re.findall(coeff_pat, line)[0])
+            zCoeffId = _co.namedtuple('zCoeff', ['Z{}'.format(i) for i in range(1, maxZern + 1)])
 
-        zCoeffId = _co.namedtuple('zCoeff',
-                    ['Z{}'.format(i+1) for i in range(line_list_len - start_line)])
         zCoeff = zCoeffId(*zCoeffs)
 
         if not keepFile:
@@ -12151,17 +12178,20 @@ def _getDecodedLineFromFile(fileObj):
         with fenc as f:
             for line in f:
                 decodedLine = line.decode(unicode_type)
+                decodedLine = _zfu.checkDecimalSeparators(decodedLine)
                 yield decodedLine.rstrip()
     else: # ascii
         with fileObj as f:
             for line in f:
                 if _global_pyver3: # ascii and Python 3.x
+                    line = _zfu.checkDecimalSeparators(line)
                     yield line.rstrip()
                 else:      # ascii and Python 2.x
                     try:
                         decodedLine = line.decode('raw-unicode-escape')
                     except:
                         decodedLine = line.decode('ascii', 'replace')
+                    decodedLine = _zfu.checkDecimalSeparators(decodedLine)
                     yield decodedLine.rstrip()
 
 def _readLinesFromFile(fileObj):

pyzdde/zfileutils.py

@@ -17,6 +17,7 @@
 from struct import unpack as _unpack
 from struct import pack as _pack
 import math as _math
+import re as _re
 
 import pyzdde.config as _config
 _global_pyver3 = _config._global_pyver3
@@ -884,3 +885,20 @@ def randomGridSagFile(mu=0, sigma=1, semidia=1, nx=201, ny=201, unitflag=0,
                               delx, dely, unitflag, xdec, ydec, 
                               fname, comment, fext)
     return z, gridsagfile
+
+
+def checkDecimalSeparators(string):
+    """Replaces all comma decimals separators into points in the input string.
+
+    Parameters
+    ----------
+    string: str
+        The input string in which the separators are to be replaced
+
+    Returns
+    -------
+    string: str
+        The new string with the replaced decimal separators
+    """
+    return _re.sub(r'((?<=\d)|(?<=\A)|(?<=-)|(?<=\s)),(?=\d)', r'.', string)
+