Wipy 2.0 and save data on my pc, not in flash memory

[robert-hh]

@vflorio94 if the memory is short, then it is a different error. Is the error thrown during execution or when youe import the code?

[VFlorio94]

@robert-hh yes, probably something occours

Uploading project (main folder)...
Not safe booting, disabled in settings

Reading file status
[1/2] Writing file lib_imu.py
Failed to write file, trying again...
Failed to write file, trying again...
Filecheck failed
[2/2] Writing file main.py
Upload done, resetting board…

but I don't understand what.

[robert-hh]

@vflorio94 Actually I have no clue what's happening and what was done.

[VFlorio94]

@robert-hh but the message in the second line what means? when I upload file is necessary a safe booting? and here it isn't in safe booting

[robert-hh]

@vflorio94 I do not know what pymakr is doing. It can force a sfae boot via Ctrl-F, but that has to be configured somewhere in pymakr.

[VFlorio94]

@robert-hh can be something in project settings? but I didn't modify it

[robert-hh]

@vflorio94 Looks like the seeting of "safe_boot_on_upload": false

[VFlorio94]

@robert-hh yes, i see it, but i don't know if I can modify it and if i have to upload also this pymakr.conf ?

[robert-hh]

@vflorio94 pymakr.conf is local file on your PC, configuring pymakr. Why should you not be able to modify it. You may have to restart Atom after that.

[VFlorio94]

@robert-hh Hi, I need to ask you one more time. Do you know if there is a way to save on micro SD not only file.txt but also file.py?
thank you!!

[robert-hh]

@vflorio94 A python script is a text file, just with the extension .py. You can start that from sd card with two methods:
a) change the active directory to the card before import
mount the card
os.chdir("/sd")
import file
b) change the system path.
If you
import sys
print(sys.path)
you get something like ['', '/flash', '/flash/lib'], which is the list of places where the python scripts are looked for. '' is the actual directory. You can add "/sd" to that path with:
sys.path.append("/sd")
you can also directly set sys.path to the list of places.

[VFlorio94]

@robert-hh I try to update my main.py and my lib.py on sd card but I can't understand where i have to put the command that you wrote.

[robert-hh]

@vflorio94 You have to put that in boot.py or main.py in flash, because that is executed in first place.

[VFlorio94]

@robert-hh thank you, I do it.
another question, if I read data from a file.txt and I want to reuse this data, what is the way to import and/or assign them to a local variable?
thank you

[robert-hh]

@vflorio94 To read the data from a file, you could read it all in once, assumign f is the opened file, with:

text = f.readlines()

then text is a list of strings. That however will use a lot for RAM. You can also read line by line with:

for line in f:
# line is one line to be processed

[VFlorio94]

@robert-hh YEs, but i have a file.txt with this content

[169.5, 169.5, 169.5, 169.5, 169.5, 169.5, 169.5, 169.5, 169.5, 169.5, 169.5, 169.5, 169.5, 169.5, 169.5, 169.5, 169.5, 169.5, 169.5, 169.5, 169.5, 169.5, 169.5, 169.5, 169.5, 169.5, 169.5, 169.5]  [0.1875, 0.1875, 0.1875, 0.1875, 0.1875, 0.1875, 0.1875, 0.1875, 0.1875, 0.1875, 0.1875, 0.1875, 0.1875, 0.1875, 0.1875, 0.1875, 0.1875, 0.1875, 0.1875, 0.1875, 0.1875, 0.1875, 0.1875, 0.1875, 0.1875, 0.1875, 0.125, 0.1875]       [-177.5625, -177.5625, -177.5625, -177.5625, -177.5625, -177.5625, -177.5625, -177.5625, -177.5625, -177.5625, -177.5625, -177.5625, -177.5625, -177.5625, -177.5625, -177.5625, -177.5625, -177.5625, -177.5625, -177.5625, -177.5625, -177.5625, -177.5625, -177.5625, -177.5625, -177.5625, -177.625, -177.5625] 

I want to iterate data by data in this file and compare them with other value trough control 'if'.
for example I want to use data in the first square brackets and step by step compare them with other numeric value, do you know a way to do this?
I am not able to convert them in numeric value and compare them one by one, I know that i have to use a 'for' to pass all the value but I am not succeded.

[robert-hh]

@vflorio94 Can you create the file in a different format, like having one line for each set of data in brackets?

[robert-hh]

@vflorio94 You can do something like:

f = open("file.txt", "r")
line = f.read()
f.close()
# now you have the full test in one string
list = line.split("[")
# now you have a list of three strings, and an empty one
# remove the empty ones
for index, item in enumerate(list):
    if len(item) == 0:
        del list[index]
# convert to numeric value
for index, item in enumerate(list):
    item = item.strip("] ").split(",")
    # now item is a list of numeric strings
    for i, el in enumerate(item):
        item[i] = float(el)
    list[index] = item
    # now list is a list of lists with numeric values
    # indexing by list[i][j]

[VFlorio94]

@robert-hh yes, i'll create a file in which I put one set of data in brackets in a line, then there is a way to extract a single data and do a control on it and then pass to the data in the next position?

[robert-hh]

@vflorio94 In my previous post I showed a code snippet, if all data is in one line. If each bracket is in a separate line, then the code snippet is much simpler.

f = open("file1.txt", "r")
list = f.readlines()
f.close()
# now you have a list of one string per line
for index, item in enumerate(list):
    item = item.strip("[]\n ").split(",")
    # now item is a list of numeric strings
    for i, el in enumerate(item):
        item[i] = float(el)
    list[index] = item
    # now list is a list of lists wirth numeric values