Find number of days b/w 2 dates.

days_between_dates.py

@@ -0,0 +1,55 @@
+def leap_year(leap_days,year,start,step):
+    if year%100==0:
+        if year%400==0:
+            leap_days=start+1-step
+        else:
+            leap_days=start-step
+    elif year%4==0:
+        leap_days=start+1-step
+    else:
+        leap_days=start-step
+    return leap_days
+def same_year(d1,d2):
+    days=0
+    if d1[1]==d2[1]:
+        days+=d2[0]-d1[0]
+    else:
+        days+=d2[0]
+        for i in range(d2[1]-1,d1[1],-1):
+            if i in months31:
+                days+=31
+            elif i in months30:
+                days+=30
+            elif i==2:
+                feb_days=0
+                days+=leap_year(feb_days,d1[2],28,0)
+        if d1[1] in months31:
+                days+=31-d1[0]
+        elif d1[1] in months30:
+                days+=30-d1[0]
+        elif d1[1]==2:
+            feb_days=0
+            days+=leap_year(feb_days,d1[2],28,d1[0])
+    return days
+months31=[1,3,5,7,8,10,12]
+months30=[4,6,9,11]
+date1=input('Starting date (dd/mm/yyyy) - ')
+date2=input('Ending date (dd/mm/yyyy) - ')
+d1=date1.split('/')
+d2=date2.split('/')
+for i in range(3):
+    d1[i]=int(d1[i])
+for i in range(3):
+    d2[i]=int(d2[i])
+days=0
+if d1[2]==d2[2]:
+    print(same_year(d1,d2))
+else:
+    for j in range(d2[2],d1[2]+1,-1):
+        leap_year_days=0
+        days+=leap_year(leap_year_days,j,365,0)
+    days+=same_year([1,1,d2[2]],d2)
+    days+=same_year(d1,[31,12,d1[2]])+1
+    print(days)
+
+