从python中的日期格式（整数）中删除特殊字符“-”

Question

I want to remove special character '-' from date format in python. I have retrieved maximum date from a database column. Here is my small code:

def max_date():
    Max_Date= hive_select('SELECT  MAX (t_date) FROM ovisto.ovisto_log')
    value = Max_Date[0]
print value

Here is output:

{0: '2017-02-21', '_c0': '2017-02-21'}

I want only numbers without special character '-' from output. so, I am expecting this answer '20170221'

I have tried in different ways but could not get proper answer. How can I get in a simple way? Thanks for your time.

Answer 1

just rebuild a new dictionary using dict comprehension, iterating on the original dictionary, and stripping the unwanted characters from values using str.replace

d = {0: '2017-02-21', '_c0': '2017-02-21'}

new_d = {k:v.replace("-","") for k,v in d.items()}

print(new_d)

result:

{0: '20170221', '_c0': '20170221'}

if you only want to keep the values and drop the duplicates (and the order too :), use a set comprehension with the values instead:

s = {v.replace("-","") for _,v in d.items()}

Answer 2

You can try strptime:

value = Max_Date[0]
new_val= datetime.datetime.strptime( str( value ), '%Y%m%d').strftime('%m/%d/%y')

I found it here: How to convert a date string to different format