Python Shelve- Day 12(1 day later)

#shelve are same like dictionary,except that shelve can be used while #dealing with extremely large dictionary,dictionary will be handled in memory, #where as shelve will handle in a separate file #key points to note in shelve is that , the file with extension .db(or dit,bak,dat) ## will be created, #in dictionary since it is in memory,even if there is any mistake like type we can #change it immediately by changing the typo ,where as in shelve we have to #delete that key combination

  
import shelve

# with shelve.open("D:/WORK/2018/February/22-02-2018-Thursday/shelvetest1")as fruit:
#     fruit = {"orange":"its a fruit which is orange in color",
#               "apple":"good for health"}
#     print(fruit)
#     print(fruit["orange"])
# print("="*40)
# print(fruit["orange"])
# print(fruit)

with shelve.open("D:/WORK/2018/February/22-02-2018-Thursday/shelvetest2")as fruit:
    fruit["orange"]="its a fruit which is orange in color"
    fruit["apple"]="good for health"
print(fruit)
print("="*40)
#the below peice of code will throw an error
# print(fruit["orange"])


with shelve.open("D:/WORK/2018/February/22-02-2018-Thursday/shelvebike1")as bike:
    bike["name"]="tvs"
    bike["engine_cc"]="250 cc"
    #even if removed and executes the below code it will be saved
    #in the first run and remains there,which is not the case if
    #it is normal dictionary
    # bike["engin_cc"]="250 cc"
    bike["model"]="victor"
    print(bike)
    for i in bike:
        print(i)
        print(bike[i])
###############################################################################
import shelve

with shelve.open("D:/WORK/2018/February/22-02-2018-Thursday/shelvebike1")as bike:
    bike["name"]="tvs"
    bike["engine_cc"]="250 cc"
    #even if removed and executes the below code it will be saved
    #in the first run and remains there,which is not the case if
    #it is normal dictionary
    # bike["engin_cc"]="250 cc"
    #we can delete that key using,it has to be run one time only
    # del bike["engin_cc"]
    bike["model"]="victor"
    print(bike)
    for i in bike:
        print(i)
        print(bike[i])