Erase whole array Python

Question

How do I erase a whole array  leaving it with no items   I want to do this so I can store new values in it  a new set of 100 floats  and find the minimum   Right now my program is reading the minimum from sets before I think because it is appending itself with the previous set still in there   I use  append by the way

User · Answer

Well yes arrays do exist  and no they re not different to lists when it comes to things like del and append    gt  gt  gt  from array import array  gt  gt  gt  foo   array  i   range 5    gt  gt  gt  foo array  i    0  1  2  3  4    gt  gt  gt  del foo     gt  gt  gt  foo array  i    gt  gt  gt  foo append 42   gt  gt  gt  foo array  i    42    gt  gt  gt    Differences worth noting  you need to specify the type when creating the array  and you save storage at the expense of extra time converting between the C type and the Python type when you do arr i    expression or arr append expression   and lvalue   arr i

User · Answer

Note that list and array are different classes   You can do   del mylist      This will actually modify your existing list   David s answer creates a new list and assigns it to the same variable   Which you want depends on the situation  e g  does any other variable have a reference to the same list     Try   a    1 2  b   a a        and  a    1 2  b   a del a      Print a and b each time to see the difference

User · Answer

It s simple   array        will set array to be an empty list   They re called lists in Python  by the way  not arrays   If that doesn t work for you  edit your question to include a code sample that demonstrates your problem

User · Answer

Now to answer the question that perhaps you should have asked  like  I m getting 100 floats form somewhere  do I need to put them in an array or list before I find the minimum    Answer  No  if somewhere is a iterable  instead of doing this   temp      for x in somewhere     temp append x  answer   min temp    you can do this   answer   min somewhere    Example   answer   min float line  for line in open  floats txt

[python] Erase whole array Python

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