How can I generalize getting values from a dictionary key?-CodePudding

I have a list of dictionaries such as:

[ {'Type': 'Water', 'Level': '8'}, {'Type': 'Fire', 'Level': '2'}, {'Type': 'Fire', 'Level': '8'}, ... ]

I have this code that basically prints it as a table:

my_list_of_dics = [ {'Type': 'Water', 'Level': '8'}, {'Type': 'Fire', 'Level': '2'}, {'Type': 'Fire', 'Level': '8'}]

#Initialize string
string_table = ""

#Print headers
for key in my_list_of_dics[0]:
    string_table  = key   "\t"

#Jump line
string_table  = "\n"

#Print values (rows), matching the header order and tabulations between each value and jump a line after each row
for row in my_list_of_dics:
    string_table  = row['Type']   "\t"   row['Level']   "\n"

print(string_table)

Prints this:

Type  Level   
Water 8
Fire  2
Fire  8

It works as I want it, however I have to hardcode the names of the keys and the number of tabulations ( "\t") between each when printing it out.

Generating the headers of the table is fortunately generalized, however I haven't beeen able to generalize the printing key's values and the number of tabulations (as seen in my 2nd loop).

CodePudding user response：

If all the dictionaries have the same keys, you can replace the line of code in your for loop with:

string_table  = '\t'.join(row[key] for key in my_list_of_dics[0])   '\n'

Note you can optimise this by defining

keys = list(my_list_of_dics[0].keys())

then you can just use

string_table  = '\t'.join(row[key] for key in keys)   '\n'

and you can make the first line of the table with

string_table = '\t'.join(keys)   '\n'

CodePudding user response：

You can use python format to create tables.

my_list_of_dics = [
    {"Type": "Water", "Level": "8"},
    {"Type": "Fire", "Level": "2"},
    {"Type": "Fire", "Level": "8"},
]

print("{:<10} {:<10}".format("Type", "Level"))
for val in my_list_of_dics:
    print("{:<10} {:<10}".format(val["Type"], val["Level"]))

will give us

Type       Level     
Water      8         
Fire       2         
Fire       8

More generalized form

my_list_of_dics = [
    {"Type": "Water", "Level": "8"},
    {"Type": "Fire", "Level": "2"},
    {"Type": "Fire", "Level": "8"},
]

get_keys = list(my_list_of_dics[0].keys())
fmt = "{:<10}" * len(get_keys)
print(fmt.format(*get_keys))
for val in my_list_of_dics:
    print(fmt.format(*val.values()))