import json
import uuid
 
jsonString = '{"firstname": "John", "lastname": "Doe"}'

# Create random file name and write json to file
filename = str(uuid.uuid4())

with open(filename, "w") as f:
    f.write(jsonString)

# Parse JSON string
# Deserializes json string into dict
print("Parse JSON string")
jsonDict = json.loads(jsonString)

# Iterating through the json
for key, value in jsonDict.items():
    print(key, value)

print()
#----------------------------------------------------#

print("Read JSON file")
f = open (filename, "r")
 
# Reading from file
jsonDict = json.loads(f.read())
 
# Iterating through the json
for key, value in jsonDict.items():
    print(key, value)
 
# Closing file
f.close()

# Output
# Parse JSON string
# firstname John
# lastname Doe
#
# Read JSON file
# firstname John
# lastname Doe

import os
import uuid

filename = str(uuid.uuid4()) # create random file name
wLines = ["First line\n", "Second line\n", "Third line\n"]

# writing lines to file
f = open(filename, 'w')
f.writelines(wLines)
f.close()

#--------------------------------------------------------#

print("-----Read lines using 'readlines' method-----")
f = open(filename, 'r')
rLines = f.readlines()

for lineNumber, line in enumerate(rLines, 1):
	print("Line {}: {}".format(lineNumber, line.strip()))

#--------------------------------------------------------#

print("-----Read lines using 'readline' method-----")
f = open(filename, 'r')
lineNumber = 1
 
while True:
    lineNumber += 1
 
    # Get next line from file
    line = f.readline()
 
    # if line is empty
    # end of file is reached
    if not line:
        break
    print("Line {}: {}".format(lineNumber, line.strip()))
 
f.close()

#--------------------------------------------------------#

print("-----Read lines via file object iteration-----")
f = open(filename, 'r')

for lineNumber, line in enumerate(f, 1):
    print("Line {}: {}".format(lineNumber, line.strip()))

#--------------------------------------------------------#

print("-----Read lines via file contex manager-----")
with open(filename, "r") as f:
    for lineNumber, line in enumerate(f, 1):
        print("Line {}: {}".format(lineNumber, line.strip()))

os.remove(filename) # remove file

# Output example:

# Read lines using 'readlines' method
# Line 1: First line
# Line 2: Second line
# Line 3: Third line