Making simple calculation program in Python

```while True:
# -- Get user input and make list --
data = input("Asset(JPY),Amount of Trade,Loss-cut percentage/Exit(E)>>")
if data == "E" or data == "e":
break

list = data.split(",")

# -- Check validity of the user input --
if len(list) != 3:
print("Arguments error. Please check the total number of arguments.")
continue
if all(float(s) for s in list) == False:
print("Arguments error. Please input only numbers.")
continue

list = [float(x) for x in list]

# -- Compute a result --
#list is totalAsset
#list is loss cut percentage
losscut_jpy = list*(list*0.01)
losscut_pips = float(losscut_jpy / list)*100

print("Loss-cut is {0}pips or less.".format(losscut_pips))
```

I made very little Python program. This code outputs losscut point from an asset, the amount of trade, a percentage of loss-cut.

I thought three things, that is...

• How to make a list from a data separated with "," a comma-separated data?
• How to get length(size) of a list?
• How to check if all conditions are True?
• How to convert all item's type of a list?

How to make a list from a comma-separated data

string.split() is used to separate with any character. string.split() returns a list.

How to get length(size) of a list?

You can use len() for getting a length of a list. The format is len(list)

How to check if all conditions are True?

all() returns True if all elements of am iterator is True. In this case,
I use float() as an argument. float() will return if the function fail the process.
So I write

```if all(float(s) for s in list) == False:
```

"all(float(s) for s in list" returns True if all the items of the list is a number.

How to convert all item's type of a list?

"List Comprehensions" can be used for this purpose.

```[statement for x in list-object]
```