How do I select specific elements from an array in python?

Using regex and assuming that you want all items written in scientific notation:

import re 
result = [item for item in array1 if re.search("E-\d+$", item) is not None]

The $ here symbolizes the end of the string, \d+ says find one or more digits after E-.

Notice that this is stricter than other solutions, and if you think any words containing "E" could appear in your array, then you should use this stricter result.

Finally, it looks like in Python that any value less than 0.0001 is written in scientific notation, so if you had access to float values, then it would simply be

result = [item for item in array1 if item < 0.0001] 

which would be faster than searching strings.

#Original Array (This is actually a list in python)
array1=['8', '-9.7521970601311E-5', '1237.16', '1265.50"', 'spec2', '=', '"2', '59', '0', '9810.07016902'] 

#Create an empty list to store the values containing "E"
array2=[]

#Go through each item in the list and if it contains "E" the append(add) it to the array2 list
for i in array1:
    if "E" in i:
        array2.append(i)

#print out the array2 to see what you have
print(array2)

you need to look for the string 'E-' for every item in the list and if the condition satisfies then store it in a different list.

array1=['E8E','EEEEEEEE', '-9.7521970601311E-5', '1237.16', '1265.50"', 'spec2', '=', '"2', '59', '0', '9810.07016902'] 
array2=[]
for i in array1:
    if "E-" in i:
        array2.append(i)
print(array2)

if you want the number from E to the end do this:

array2 = [] 
for item in array1:
   if item.contains("E-"):
       x = item.index("E-")
       y = item[x+1:]
       array2.append(y)
       #x+1 to go the next digit to the end excluding E-
       #x to the end including E-

Check if it endswith E-

array2 = [] 
for item in array1:
   if item.endswith("E-"):
        array2.append(item)
       #do something
    else:
      #do something or do nothing

Or if you want if the item contains a E- do this:

array2 = [] 
for item in array1:
    if item.contains("E-" ):
         array2.append(item)
        #do something
     else:
        #do something or do nothing