python_rdas/main.py

import requests, time, os, sys, json, csv
from bs4 import BeautifulSoup

class DataTable:
    def __init__(self):
        self.table = {}
        self.cols = {}
        self.rows = {}

class DataPocket:
    def __init__(self):
        self.rows = {}

    def addRow(self, rownum, name=None, values=None):
        ### values should be a list in column order
        rownum = int(rownum)
        d = {'name': name,
             'values': [] if values == None else [x for x in values]
            }
        self.rows[rownum] = d

    def addName(self, rownum, name):
        if int(rownum) in self.rows.keys():
            self.rows[rownum]['name'] = name
        else:
            print("No such row.")

    def addValues(self, rownum, values):
        ### values should be a list in column order
        if int(rownum) in self.rows.keys():
            self.rows[rownum]['values'] = [x for x in values]
        else:
            print("No such row.")

    def setValue(self, rownum, value, col):
        ### col should be a zero-indexed integer
        col = int(col)
        if int(rownum) in self.rows.keys():
            try:
                self.rows[rownum]['values'][col] = value
            except IndexError:
                while len(self.rows[rownum]['values'] < col):
                    self.rows[rownum]['values'].append(None)
                self.rows[rownum]['values'].append(value)
        else:
            print("No such row.")

    def printRow(self, rownum):
        if int(rownum) in self.rows.keys():
            print("Row {} (\"{}\"): {}".format(rownum, self.rows[rownum]['name'], self.rows[rownum]['values']))
        else:
            print("No such row.")

    def printData(self):
        for row in self.rows.keys():
            self.printRow(row)

class DataColl:
    def __init__(self):
        self._year = None
        self._row = None
        self._col = None
        self._control = None
        self._cf_eq = None
        self._control_filter = None
        self._weight = None
        self._chisq = None
        self._fmt = None

    @property
    def year(self):
        return self._year

    @year.setter
    def year(self, year):
        # if int(year) < 2014:
        #    print("NSDUH does not have data from before 2014. Setting to 2014.")
        #    self._year = 2014
        self._year = int(year)
        self._generate()

    @property
    def row(self):
        return self._row

    @row.setter
    def row(self, r):
        self._row = r
        self._generate()

    @property
    def col(self):
        return self._col

    @col.setter
    def col(self, c):
        self._col = c
        self._generate()

    @property
    def control(self):
        return self._control

    @control.setter
    def control(self, ctl):
        self._control = ctl
        self._generate()

    @property
    def cf_eq(self):
        return self._cf_eq

    @cf_eq.setter
    def cf_eq(self, eq):
        self._cf_eq = eq
        self._generate()

    @property
    def control_filter(self):
        return self._control_filter

    @control_filter.setter
    def control_filter(self, filter):
        self._control_filter = filter
        self._generate()

    @property
    def weight(self):
        return self._weight

    @weight.setter
    def weight(self, wgt):
        self._weight = wgt
        self._generate()

    @property
    def chisq(self):
        return self._chisq

    @chisq.setter
    def chisq(self, cs):
        self._chisq = cs
        self._generate()

    @property
    def fmt(self):
        return self._fmt

    @fmt.setter
    def fmt(self, f):
        self._fmt = f
        self._generate()

    @property
    def endpoint(self):
        return self._endpoint

    def _generate(self):
        self.setEndpoint(False)
        self.setFilename(False)

    def setEndpoint(self, loud=True):
        if loud and self._year == None or self._row == None or self._col == None:
            print("Year, row, and column must be set in order to build an endpoint.")
            self._endpoint = None
        lcontrol = "" if self.control == None else "&control={}".format(self.control)
        lcfnot = "" if self.cf_eq == True else "!"
        lcontrol_filter = "" if (self.control_filter == None or lcontrol == "") else "&filter={}{}%3D{}".format(self.control, lcfnot, self.control_filter)
        lweight = "" if self.weight == None else "&weight={}".format(self.weight)
        lchisq = "&run_chisq=false" if self.chisq == False or self.chisq == None else "&run_chisq=true"
        lfmt = "json" if (self.fmt == None or self.fmt not in ["json", "msgpack", "api"]) else self.fmt
        year_rng = "{}-{}".format(int(self.year), int(self.year)+1)
        self._endpoint = "https://rdas.samhsa.gov/api/surveys/NSDUH-{}-RD02YR/crosstab/?row={}&column={}{}{}{}{}&format={}".format(
            year_rng,
            self.row,
            self.col,
            lcontrol,
            lcontrol_filter,
            lweight,
            lchisq,
            lfmt
        )
    
    @property
    def filename(self):
        return self._filename

    def setFilename(self, loud=True, ext=None):
        if loud and self._year == None or self._row == None or self._col == None:
            print("Year, row, and column must be set in order to build a filename.")
            self._filename = None
        lext = "csv" if ext == None else ext
        lcontrol = "" if self.control == None else "_ctl_{}".format(self.control)
        lcfnot = "" if self.cf_eq == True else "n"
        lcontrol_filter = "" if (self.control_filter == None or lcontrol == "") else "_{}eq_{}".format(lcfnot, self.control_filter)
        lweight = "" if self.weight == None else "_weight_{}".format(self.weight)
        lchisq = "_chisq_false" if self.chisq == False or self.chisq == None else "_chisq_true"
        self._filename = "NSDUH_{}_{}_vs_{}{}{}{}{}.{}".format(
            self.year,
            self.row,
            self.col,
            lcontrol,
            lcontrol_filter,
            lweight,
            lchisq,
            lext
        )

    def toString(self):
        print("Data Collector:")
        print("Row: {}, Column: {}".format(self.row, self.col))
        print("Controlling on {} {}= {}".format(self.control, self.control_filter[0], self.control_filter[1]))
        print("Weighted by {}".format(self.weight))
        print("Generating Chi-Squared" if self.chisq else "Not generating Chi-Squared")
        print("Formatting as {}".format(self.fmt))
        print("URL: {}".format(self.endpoint))

def main():
    df = DataColl()
    df.year = 2017
    df.row = "STATE"
    df.col = "YOSELL2"
    df.control = "CATAG18"
    df.cf_eq = True
    df.control_filter = "2"
    df.weight = "DASWT_1"
    df.chisq = False
    df.fmt = "json"
    print(df.endpoint)

    df.setFilename(False, "csv")

    r = requests.get(df.endpoint)

    rjson = r.json() # this creates a Python object, not a JSON string
    # in results/cells, column_option and row_option refer to the key field, not the list index
    # in column_option and row_option, missing value is coded as "", but coded as "." in key field

    


if __name__ == "__main__":
    main()