title: Write to file using IF statement
body: <p>I am using the Weather Underground API to write historical weather data to a csv.  I am not having any issues with my Python Program.  However, I want to add a conditional statement that tells my program to only write weather observations that include rain.  So, if it’s raining in Detroit on observation j, then write the hour, conditions, rain, snow, temp_f.  </p>
  
  <p>Below is the last section of the program.  “for j in range” loops through the weather observations on a given day.  “rain” is binary.</p>
  
  <p>Again, everything else in the program works great.  The only change that I’ve made to a working program, is the “if rain == 0:”...and now it doesn’t write the data to my csv.  There are no error messages.</p>
  
  <p>Any help is greatly appreciated.  </p>
  
  <p>Paul</p>
  
  <pre><code>  for j in range(len(parsed_json['history']['observations'])):
              hour = parsed_json['history']['observations'][j]['date']['hour']
              conditions = parsed_json['history']['observations'][j]['conds']
              rain = parsed_json['history']['observations'][j]['rain']
              snow = parsed_json['history']['observations'][j]['snow']
              temp_f = parsed_json['history']['observations'][j]['tempi']
  
              if rain == 0: 
                  myfile.write('\n')
                  myfile.write(str(dd[i]))
                  myfile.write(',')
                  myfile.write(str(hour))
                  myfile.write(',')
                  myfile.write(str(cities[b]))
                  myfile.write(',')
                  myfile.write(str(temp_f))
                  myfile.write(',')
                  myfile.write(str(conditions))
                  myfile.write(',')
                  myfile.write(str(rain))
                  myfile.write(',')
                  myfile.write(str(snow))
                  myfile.write(',') 
  </code></pre>