Modified parser to recognise a comma delimited lvm format

data/with_empty_fields.lvm

@@ -13,7 +13,7 @@ Time	14:37:48.201000213623046875
 
 Notes	X values guaranteed valid only for Dev0/Ai0
 Channels	7
-Samples	100	100	0	0	0	0	100
+Samples	7	7	0	0	0	0	7
 Date	2016/08/11	2016/08/11	2016/08/11	2016/08/11	2016/08/11	2016/08/11	2016/08/11
 Time	15:37:48.375	15:37:48.375	15:37:48.375	15:37:48.375	15:37:48.375	15:37:48.375	15:37:48.375
 X_Dimension	Time	Time	Time	Time	Time	Time	Time

lvm_format.py

@@ -0,0 +1,253 @@
+END_OF_HEADER = "***End_of_Header***"
+DATE_FORMAT = "%Y/%m/%d"
+TIME_FORMAT = "%H:%M:%S"
+
+SPECIFICATION_REF = "https://www.ni.com/en/support/documentation/supplemental/06/specification-for-the-labview-measurement-file---lvm-.html"
+
+# Identifies the file as a LabVIEW measurement file (.lvm).
+# This tag always appears in column 0, row 0
+# (the first characters in the file).
+FILE_MAGIC_IDENTIFIER = "LabVIEW Measurement"
+
+# File Headers appear at the beginning of the LVM before the first
+# END_OF_HEADER is reached
+FILE_HEADERS = {
+    # Date when the data collection started.
+    "Date": {
+        "required": True,
+        "type": "date"  # YYYY/MM/DD
+    },
+    # Description of the data in the file.
+    "Description": {
+        "required": False,
+        "default": '',
+        "type": "text"
+    },
+    # Specifies whether each packet has a header.
+    "Multi_Headings": {
+        "required": False,
+        "default": False,
+        "type": "bool"
+    },
+    "Operator": {
+        "required": False,
+        "default": '',
+        "type": "text"
+    },
+    # Name of the project associated with the data in the file
+    "Project": {
+        "required": False,
+        "default": '',
+        "type": 'text'
+    },
+    # Version number of reader needed to parse the file correctly the file
+    # type.
+    # For example, a 1.0 version of a reader can parse the file until the file
+    # format changes so much that it is no longer backwards compatible.
+    # The Writer_Version supplies the actual file type version.
+    "Reader_Version": {
+        "required": False,
+        "default": "Writer_Version",
+        "type": "float"  # Major.Minor
+    },
+    # Character(s) used to separate each field in the file. You can use any
+    # character as a separator except the new line character. However,
+    # base-level readers usually use tabs or commas as delimiters. Escape
+    # other text fields in the file to prevent the separator character(s) from
+    # appearing as text rather than delimiters. To use the character(s)
+    # specified as a delimiter requires that you know what that character(s)
+    # is. To find out what the separator character(s) is, read the entire
+    # header block and search for the keyword Separator. The character(s) that
+    # follows the keyword is the separator. To parse the file faster, place
+    # this field in the header after the LabVIEW Measurement ID field. To read
+    # in the entire header block, read until you find the ***End_of_Header***
+    # tag.
+    "Separator": {
+        "required": False,
+        "default": '\t',
+        "type": "text"
+    },
+    # The default is the decimal separator of the system.
+    # Symbol used to separate the integral part of a number from the
+    # fractional part. A decimal separator usually is a dot or a comma.
+    "Decimal_Separator": {
+        "required": False,
+        "default": ',',
+        "type": "text"
+    },
+    # Time at which the start of a data series occurred.
+    "Time": {
+        "required": True,
+        "type": "time"
+        # HH:MM:SS.XXX - The format is the same, regardless of the system time
+        # configuration. The SS.XXX is the number of seconds since the last
+        # minute as a floating-point number. The number of digits in the
+        # fractional seconds is arbitrary and can be zero. If there are no
+        # fractional seconds, the decimal point is optional.
+    },
+    # Format of the x-axis values. This tag is valid only if the X_Dimension
+    # tag value is Time
+    # Options:
+    # Absolute - x-value is number of seconds since midnight, January 1, 1904
+    # GMT
+    # Relative - x-value is number of seconds since the date and time stamps
+    "Time_Pref": {
+        "required": False,
+        "default": "Relative",
+        "type": "options",
+                "options": ["Absolute", "Relative"]
+    },
+    # Version number of the file type written by the software.
+    "Writer_Version": {
+        "required": True,
+        "type": "float"  # Major.Minor
+    },
+    # Specifies which x-values are saved.
+    # Options:
+    # No - save no x-values. The first data column is blank. The x-values can
+    #      be generated from the X0 and Delta_X values.
+    # One - saves one column of x-values. This column corresponds to the
+    #       first column of data that contains the most number of samples.
+    # Multi - saves a column of x data for every column of y data.
+    "X_Columns": {
+        "required": False,
+        "default": "One",
+        "type": "options",
+        "options": ["No", "One", "Multi"]
+    }
+}
+
+# Segment Headers are found after the file headers and immediately preceding
+# data.
+SEGMENT_HEADERS = {
+    # Number of channels in the packet. This field must occur before any
+    # fields that depend on it. For example, the Samples field has entries
+    # for each channel, so the reader must know the number of channels to
+    # properly parse it.
+    "Channels": {
+        "required": True,
+        "type": "integer"
+    },
+    # Date the data set in the segment started. There are separate dates for
+    # each data set. The dates are placed in the same column as the y data
+    # of the data set.
+    "Date": {
+        "required": True,
+        "type": "date"  # YYYY/MM/DD
+    },
+    # The increment between points on the x-axis. The .lvm format assumes
+    # all data is equally spaced in the x-dimension. There is one value for
+    # each data set in the packet. The value appears in the same column as
+    # the y-values for the data.
+    "Delta_X": {
+        "required": True,
+        "type": "number"
+    },
+    # Comments the user adds to the segment header. A segment header does not
+    # necessarily exist for every packet. Use the Comment field at the far
+    # right of the data for specific notes about each segment.
+    "Notes": {
+        "required": False,
+        "default": "",
+        "type": "text"
+    },
+    # Number of samples in each waveform in the packet.
+    # There is one entry for every data set.
+    # The entry appears in the same column as the y data of the data set.
+    "Samples": {
+        "required": True,
+        "type": "integer"
+    },
+    # Name of the test that acquired the segment of data.
+    "Test_Name": {
+        "required": False,
+        "default": "",
+        "type": "text"
+    },
+    # Test numbers in the Test_Series that acquired the data in this segment.
+    # Semicolons separate the test numbers. If the file separator is a
+    # semicolon, commas separate the numbers.
+    "Test_Numbers": {
+        "required": False,
+        "default": "",
+        "type": "text"
+    },
+    # Series of the test performed to get the data in this packet.
+    "Test_Series": {
+        "required": False,
+        "default": "",
+        "type": "text"
+    },
+    # Time of day when you started acquiring the data set in the segment.
+    # Each data set includes a different time.
+    # The times are placed in the same column as the y data of the data set.
+    "Time": {
+        "required": True,
+        "type": "time"
+        # HH:MM:SS.XXX - The format is the same, regardless of the computer
+        # locale. The HH is the number of hours since midnight. The MM field
+        # is the number of minutes since the last hour. The SS.XXX is the
+        # number of seconds since the last minute as a floating-point number.
+        # The number of digits in the fractional seconds is arbitrary and can
+        # be zero. If there are not fractional seconds, the decimal point is
+        # optional.
+    },
+    # Model number of the unit under test
+    "UUT_M/N": {
+        "required": False,
+        "default": "",
+        "type": "text"
+    },
+    # Name or instrument class of the unit under test.
+    "UUT_Name": {
+        "required": False,
+        "default": "",
+        "type": "text"
+    },
+    # Serial number of the unit under test.
+    "UUT_S/N": {
+        "required": False,
+        "default": "",
+        "type": "text"
+    },
+    # The initial value for the x-axis. Each data set in the packet has a 
+    # single X0 value. The value appears in the same column as the y-values
+    # for the data.
+    "X0": {
+        "required": True,
+        "type": "number"
+    },
+    # Unit type of the x-axis. The actual data does not need to be in SI units.
+    # The X_Unit_Label field indicates the actual units of the data.
+    "X_Dimension": {
+        "required": False,
+        "default": "Time",
+        "type": "text"
+    },
+    # Labels for the units used in plotting the x data.
+    # The label appears in the same column as the y data to which it corresponds.
+    # You do not have to fill in all unit labels.
+    "X_Unit_Label": {
+        "required": False,
+        "default": "Default SI Unit",
+        "type": "text"
+    },
+    # Unit type of the y-axis. The actual data does not need to be in SI units.
+    # The Y_Unit_Label field indicates the actual units of the data.
+    "Y_Dimension": {
+        "required": False,
+        "default": "Electric Potential",
+        "type": "text"
+    },
+    # Labels for the units used in plotting the y data.
+    # The label appears in the same column as the y data to which it corresponds.
+    # You do not have to fill in all unit labels.
+    "Y_Unit_Label": {
+        "required": False,
+        "default": "Default SI Unit",
+        "type": "text"
+    }
+}
+
+SPECIAL_BLOCK_START = "***Start_Special***"
+SPECIAL_BLOCK_END = "***End_Special***"