my code v2.py

#https://data.nasa.gov/resource/eva.json

data_f = open('/home/sarah/Projects/ssi-ukrn-fair-course/eva-data.json', 'r')
fieldnames = ("EVA #", "Country", "Crew    ", "Vehicle", "Date", "Duration", "Purpose")

data=[]
import json

data_t = open('/home/sarah/Projects/ssi-ukrn-fair-course/data.csv', 'w')
dt = []

for i in range(374):
    line=data_f.readline()
    print(line)
    data.append(json.loads(line[1:-1]))
#data.pop(0)
## Comment out this bit if you don't want the spreadsheet
import csv

w=csv.writer(data_t)

import datetime as dt

time = []
date =[]




j=0
for i in data:
    print(data[j])
    # and this bit
    w.writerow(data[j].values())
    if 'duration' in data[j].keys():
        tt=data[j]['duration']
        if tt == '':
            pass
        else:
            t=dt.datetime.strptime(tt,'%H:%M')
            ttt = dt.timedelta(hours=t.hour, minutes=t.minute, seconds=t.second).total_seconds()/(60*60)
            print(t,ttt)
            time.append(ttt)
            if 'date' in data[j].keys():
                date.append(dt.datetime.strptime(data[j]['date'][0:10], '%Y-%m-%d'))
                #date.append(data[j]['date'][0:10])

            else:
                time.pop(0)
    j+=1

t=[0]
for i in time:
    t.append(t[-1]+i)

date,time = zip(*sorted(zip(date, time)))

import matplotlib.pyplot as myplot

myplot.plot(date,t[1:],'-')
myplot.plot(date,t[1:],'ko')
myplot.show()