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AnaDB.py
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AnaDB.py
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#AnaDB
#Made for use in my own personal projects
#Not intended to be a full-featured database and shouldn't be treated as such
#This is just for me to search & update lists with more convenience
#Example on usage below
#from AnaDB import AnaDatabase
#urgovaan = AnaDatabase("Urgovaan")
#urgovaan.create("creatures", ["name", "hp", "dmg"])
#urgovaan.enter("creatures", ["Orc", 100, 20])
#urgovaan.getWhere("creatures", "name=Orc")
#urgovaan.getWhere("creatures", "hp>50", "select=name,dmg")
#urgovaan.update("creatures", "name=Orc", "name,hp,dmg", "Orc 2.0", 200, 40)
#urgovaan.removeWhere("creatures", "dmg<50")
#urgovaan.save()
#urgovaan.load()
import os
import pickle
class AnaDatabase:
def __init__(self, name):
self.name = name
self.tables = []
self.columns = []
self.entries = []
def findTableIndex(self, tableName):
for i in range(0, len(self.tables)):
if self.tables[i].lower() == tableName.lower(): return i
return False
def findColumnIndex(self, tableName, columnName):
index = self.findTableIndex(tableName)
for x in range(0, len(self.columns[index])):
if (self.columns[index][x].lower() == columnName.lower()): return x + 1
def create(self, tableName, tableColumns):
self.tables.append(tableName)
self.columns.append(tableColumns)
def enter(self, tableName, entryInput):
index = self.findTableIndex(tableName)
toEnter = [index]
for x in entryInput: toEnter.append(x)
self.entries.append(toEnter)
def getOperator(self, conditions):
operators = ["=",">", "<", "#"]
for x in conditions:
for y in operators:
if x == y: return y
def checkCondition(self, x, y, operator):
if operator == ">":
return(int(x) > int(y))
if operator == "=":
if isinstance(x, str): return(str(x) == str(y))
if isinstance(x, int): return(int(x) == int(y))
if operator == "#":
if isinstance(x, str): return(str(x) != str(y))
if isinstance(x, int): return(int(x) != int(y))
if operator == "<":
return(int(x) < int(y))
def loopThroughTable(self, tableName):
index = self.findTableIndex(tableName)
toReturn = []
for x in self.entries:
if x[0] == index: toReturn.append(x)
return toReturn
def getWhere(self, tableName, conditions, *args):
conditionsSplit = conditions.split(",")
returnList = []; x = ""; y = ""; operator = ""
tempEntries = self.loopThroughTable(tableName)
if len(conditionsSplit) == 1:
operator = self.getOperator(conditionsSplit[0])
arguments = conditions.split(operator)
for entry in tempEntries:
x = (entry[self.findColumnIndex(tableName, arguments[0])])
y = arguments[1]
if self.checkCondition(x, y, operator): returnList.append(entry)
else:
for entry in tempEntries:
for x in conditionsSplit:
operator = self.getOperator(x)
arguments = x.split(operator)
x = (entry[self.findColumnIndex(tableName, arguments[0])])
y = arguments[1]
if not self.checkCondition(x, y, operator): add = False
if len(args) == 1:
conditionsSplit = args[0].split("=")
if conditionsSplit[0] == "select":
newReturnList = []; indexes = []
conditionsSplit = conditionsSplit[1].split(",")
for x in conditionsSplit: indexes.append(self.findColumnIndex(tableName, x))
for x in returnList:
tempList = []
for i in range(0, len(indexes)):
tempList.append(x[indexes[i]])
newReturnList.append(tempList)
returnList = newReturnList
return(returnList)
def update(self, tableName, conditions, arguments, *args):
toReplace = (self.getWhere(tableName, conditions))
toReplaceWith = []; indexes = []
argumentsSplit = arguments.split(",")
for x in argumentsSplit: indexes.append(self.findColumnIndex(tableName, x))
for x in toReplace:
for i in range(0, len(indexes)):
x[indexes[i]] = args[i]
toReplaceWith.append(x)
for i in range(0, len(toReplace)):
for y in range(0, len(self.entries)):
if toReplace[i] == self.entries[y]: self.entries[y] = toReplaceWith[i]
def removeWhere(self, tableName, conditions, *args):
toRemove = self.getWhere(tableName, conditions)
for x in toRemove:
for i in range(0, len(self.entries)):
if x == self.entries[i]: self.entries.pop(i); break
def save(self):
if not os.path.exists(str(self.name)):
os.makedirs(str(self.name))
with open(str(self.name) + "/" 'tables.ana', 'wb') as f:
pickle.dump(self.tables, f)
with open(str(self.name) + "/" 'columns.ana', 'wb') as f:
pickle.dump(self.columns, f)
with open(str(self.name) + "/" 'entries.ana', 'wb') as f:
pickle.dump(self.entries, f)
def load(self):
with open(str(self.name) + "/" 'tables.ana', 'rb') as f:
self.tables = pickle.load(f)
with open(str(self.name) + "/" 'columns.ana', 'rb') as f:
self.columns = pickle.load(f)
with open(str(self.name) + "/" 'entries.ana', 'rb') as f:
self.entries = pickle.load(f)