wreport provides access to weather data in BUFR and CREX formats.
The 'wreport' module has a few global methods:
and several classes, documented in their own sections.
Var holds a measured value, which can be integer, float or string, and a wreport.Varinfo with all available information (description, unit, precision, ...) related to it.
Var objects can be created from a wreport.Varinfo object, and an optional value. Omitting the value creates an unset variable.
Examples:
v = wreport.Var(table["B12101"], 32.5)
# v.info returns detailed informations about the variable in a Varinfo object.
print("%s: %s %s %s" % (v.code, str(v), v.info.unit, v.info.desc))
- code
- variable code
- enq
enq() -> str|float|long
get the value of the variable, as int, float or str according the variable definition
- enqc
enqc() -> str
get the value of the variable, as a str
- enqd
enqd() -> float
get the value of the variable, as a float
- enqi
enqi() -> long
get the value of the variable, as an int
- format
format(default="") -> str
return a string with the formatted value of the variable
- get
get(default=None) -> str|float|long|default
get the value of the variable, with a default if it is unset
- info
- Varinfo for this variable
- isset
- true if the value is set
Varinfo object holds all possible information about a variable, such as its measurement unit, description and number of significant digits.
Varinfo objects cannot be instantiated directly, and are created by querying wreport.Vartable objects.
- bit_len
- number of bits used to encode the value in BUFR
- bit_ref
- reference value added after scaling, for BUFR decoding
- code
- variable code
- desc
- description
- len
- number of significant digits
- scale
- scale of the value as a power of 10
- type
- return a string describing the type of the variable (string, binary, integer, decimal)
- unit
- measurement unit
Collection of Varinfo objects indexed by WMO BUFR/CREX table B code.
A Vartable is instantiated by the name (without extension) of the table file installed in wreport's data directory (normally, /usr/share/wreport/):
table = wreport.Vartable("B0000000000000023000")
print(table["B12101"].desc)
for i in table:
print(i.code, i.desc)
- get_bufr
- Vartable.get_bufr(basename=None, originating_centre=0, originating_subcentre=0,
- master_table_number=0, master_table_version_number=None, master_table_version_number_local=0) -> wreport.Vartable
Look up a table B file using the information given, then load BUFR information from it.
You need to provide either basename or master_table_version_number.
- get_crex
- Vartable.get_crex(basename=None, edition_number=2,
- originating_centre=0, originating_subcentre=0, master_table_number=0, master_table_version_number=None, master_table_version_number_bufr=None, master_table_version_number_local=0) -> wreport.Vartable
Look up a table B file using the information given, then load CREX information from it.
You need to provide either basename or master_table_version_number or master_table_version_number_bufr.
- load_bufr
Vartable.load_bufr(pathname) -> wreport.Vartable
Load BUFR information from a Table B file and return it as a wreport.Vartable.
- load_crex
Vartable.load_crex(pathname) -> wreport.Vartable
Load CREX information from a Table B file and return it as a wreport.Vartable.
- pathname
- name of the table