dic =defadd_info(filename):
user_info =
with open(filename, 'r
', encoding='
utf-8
') as f:
lines =f.readlines()
last_line = lines[-1]
id_max = last_line[dic['id'
]]
ifid_max.isdigit():
name = input('
請輸入姓名：
').strip()
ifname.isspace():
print('
姓名不能為空')
else
: age = input('
請輸入年齡：
').strip()
ifage.isspace():
print('
年齡不能為空')
elif
notage.isdigit():
print('
年齡必須是數字')
else
: phone = input('
').strip()
ifphone.isspace():
print('
**不能為空')
elif
notphone.isdigit():
print('
**必須全部由數字組成')
else
: job = input('
請輸入工作：
').strip()
ifjob.isspace():
print('
工作不能為空')
else
: with open(filename, 'a
', encoding='
utf-8
') as f:
info = ','
.join(user_info)
iff.writable():
if f.write(info) >0:
print('
使用者[%s]的資訊新增成功！
'%name)
defdel_info():
pass
defread_file(filename):
with open(filename, encoding='
utf-8
') as f:
for line in
f: line =line.strip()
line_list = line.split(','
)
yield
line_list
defcond_filter(condition, filename):
condition =condition.strip()
if'>='in
condition:
condition = condition.split('
>=')
col =condition[0].strip()
val = condition[1].strip()
g =read_file(filename)
for line_list in
g:
if int(line_list[dic[col]]) >=int(val):
yield
line_list
elif
'<='in
condition:
condition = condition.split('
<=')
col =condition[0].strip()
val = condition[1].strip()
g =read_file(filename)
for line_list in
g:
if int(line_list[dic[col]]) <=int(val):
yield
line_list
elif
'>'in
condition:
condition = condition.split('
>')
col =condition[0].strip()
val = condition[1].strip()
g =read_file(filename)
for line_list in
g:
if int(line_list[dic[col]]) >int(val):
yield
line_list
elif
'<'in
condition:
condition = condition.split('
<')
col =condition[0].strip()
val = condition[1].strip()
g =read_file(filename)
for line_list in
g:
if int(line_list[dic[col]]) yield
line_list
elif
'like'in
condition:
condition = condition.split('
like')
col =condition[0].strip()
val = condition[1].strip()
g =read_file(filename)
for line_list in
g:
if val in
line_list[dic[col]]:
yield
line_list
else
:
print('
查詢暫時只支援》=、<=、>、<、like')
defprint_info(col_lst, staff):
if'*'
incol_lst:
col_lst =dic.keys()
for i in
col_lst:
print(i, end='
\t\t\t')
print(''
)
for staff_info in
staff:
for i in
col_lst:
print(staff_info[dic[i.strip()]], end='
\t\t\t')
print(''
)print("
請選擇你的功能：新增使用者資訊 刪除使用者資訊 查詢使用者資訊 [exit] 退出")
choose = input("
請選擇你的功能：
").strip()
while
true:
ret = input("
>>>
").lower()
if'exit
'.lower() ==ret.strip():
break
if choose == '3'
: if'
where'in
ret:
select, where = ret.split('
where')
select, table = select.split('
from')
cols = select.replace('
select
', ''
).strip()
cols = cols.split(','
) g =cond_filter(where.strip(), table.strip())
print_info(cols, g)
else
: select, table = ret.split('
from')
cols = select.replace('
select
', ''
).strip()
cols = cols.split(','
) g =read_file(table.strip())
print_info(cols, g)
ret = input("
>>>")
elif choose == '1'
: add_info(
'userinfo')
ret = input("
>>>
")
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