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csv_manager.py
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import pandas as pd
class CSVHandler():
def __init__(self, database_location, indexer_col):
self.database = database_location
self.indexer_col = indexer_col
self.columns = pd.read_csv(self.database, index_col=0).columns
def exists(self, index):
df = self.get_db()
row = df[df[self.indexer_col] == index]
return len(row) > 0
# def view_account(self, index):
# df = self.get_db()
# row = df[df['holder'] == index]
# if len(row) < 1:
# return 404, 'Unable to find specified row'
# true_index = row.index.values
# if len(true_index) > 1:
# return 501, 'Too many matches'
# true_index = true_index[0]
# try:
# return_dict = df.loc[true_index].to_dict()
# return 200, return_dict
# except:
# return 500, 'Something went wrong'
def get_db(self):
return pd.read_csv(self.database, index_col = 0)
def get_value(self, index, col):
df = self.get_db()
row = df[df[self.indexer_col] == index]
if len(row) < 1:
return 404, 'Unable to find specified row'
true_index = row.index.values
if len(true_index) > 1:
return 501, 'Too many matches'
true_index = true_index[0]
try:
return_value = df.loc[true_index, col]
return 200, return_value
except KeyError:
return 403, 'Unable to find specified column'
return 500, 'Something went wrong'
def get_rows(self, index):
df = self.get_db()
rows = df[df[self.indexer_col] == index]
return rows
def edit_value(self, index, col, value):
df = self.get_db()
row = df[df[self.indexer_col] == index]
if len(row) < 1:
return 404, 'Unable to find specified row'
true_index = row.index.values
if len(true_index) > 1:
return 501, 'Too many matches'
true_index = true_index[0]
try:
df.loc[true_index, col] = value
df.to_csv(self.database)
return 200, 'Success'
except KeyError:
return 403, 'Unable to find specified column'
return 500, 'Something went wrong'
def edit_row(self, index, new_row, expected_len=None):
if expected_len == None:
expected_len = self.columns
if len(new_row) < expected_len:
return 400, 'Not enough values provided'
while expected_len < self.columns:
new_row.append(None)
expected_len += 1
df = self.get_db()
row = df[df[self.indexer_col] == index]
if len(row) < 1:
return 404, 'Unable to find specified row'
true_index = row.index.values
if len(true_index) > 1:
return 501, 'Too many matches'
true_index = true_index[0]
try:
df.loc[true_index] = new_row
df.to_csv(self.database)
return 200, 'Success'
except KeyError:
return 403, 'Unable to find specified column'
return 500, 'Something went wrong'
def add_row(self, row):
df = self.get_db()
new_df = pd.DataFrame([row], columns = df.columns)
df = df.append(new_df, ignore_index = True)
df.to_csv(self.database)
return 200, 'Success'
def add_rows(self, new_df):
df = self.get_db()
df = df.append(new_df, ignore_index = True)
df.to_csv(self.database)
return 200, 'Success'
def remove_row(self, index):
df = self.get_db()
row = df[df[self.indexer_col] == index]
if len(row) < 1:
return 404, 'Unable to find specified row'
true_index = row.index.values
if len(true_index) > 1:
return 501, 'Too many matches'
true_index = true_index[0]
try:
df.drop([true_index], inplace=True)
df.to_csv(self.database)
return 200, 'Success'
except:
return 500, 'Something went wrong'
return 500, 'Something went wrong'